Simcom SIM7100A LTE/WCDMA Module User Manual UDV SIM7100A
Shanghai Simcom Ltd. LTE/WCDMA Module UDV SIM7100A
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UDV-SIM7100A_User Manual
SIM7100A_User Manual_V1.01
Smart Machine Smart Decision
Document Title SIM7100A_User Manual_V1.01
Version 1.01
Date 2014-12-11
Status Draft
Document Control ID SIM7100A_User Manual_V1.01
General Notes
SIMCom offers this information as a service to its customers, to support application and engineering
efforts that use the products designed by SIMCom. The information provided is based upon requirements
specifically provided to SIMCom by the customers. SIMCom has not undertaken any independent search
for additional relevant information, including any information that may be in the customer’s possession.
Furthermore, system validation of this product designed by SIMCom within a larger electronic system
remains the responsibility of the customer or the customer’s system integrator. All specifications supplied
herein are subject to change.
Copyright
This document contains proprietary technical information which is the property of SIMCom Limited,
copying of this document and giving it to others and the using or communication of the contents thereof,
are forbidden without express authority. Offenders are liable to the payment of damages. All rights
reserved in the event of grant of a patent or the registration of a utility model or design. All specification
supplied herein are subject to change without notice at any time.
FCC Caution
(1)Exposure to Radio Frequency Radiation. This equipment must be installed and operated in accordance
with provided instructions and the antenna(s) used for this transmitter must be installed to provide a
separation distance of at least 20 cm from all persons and must not be collocated or operating in
conjunction with any other antenna or transmitter. End-users and installers must be provided with antenna
installation instructions and transmitter operating conditions for satisfying RF exposure compliance.
(2) Any changes or modifications not expressly approved by the grantee of this device could void the
user's authority to operate the equipment.
(3) This Transmitter must not be co-located or operating in conjunction with any other antenna or
transmitter.
(4) Changes or modifications to this unit not expressly approved by the party responsible for compliance
could void the user authority to operate the equipment.
(5) the modules FCC ID is not visible when installed in the host, or
(6) if the host is marketed so that end users do not have straight forward commonly used methods for
access to remove the module so that the FCC ID of the module is visible; then an additional permanent
label referring to the enclosed module: Contains Transmitter Module FCC ID: UDV-SIM7100A or
Contains FCC ID: UDV-SIM7100A must be used.
Copyright © Shanghai SIMCom Wireless Solutions Ltd. 2014
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Contents
SIM7100A_User Manual_V1.01 ................................................................................................................. 1
Contents ........................................................................................................................................................ 3
Table Index ................................................................................................................................................... 6
Figure Index ................................................................................................................................................. 8
Revision History .......................................................................................................................................... 9
1Introduction ........................................................................................................................................ 10
1.1Product Outline .............................................................................................................................. 10
1.2Hardware Interface Overview ......................................................................................................... 11
1.3Hardware Diagram .......................................................................................................................... 11
1.4Functional Overview...................................................................................................................... 12
2Package Information .......................................................................................................................... 15
2.1Pin Configuration ........................................................................................................................... 15
2.2Pin description ............................................................................................................................... 17
2.3Package Dimensions ...................................................................................................................... 21
2.4Footprint Recommendation ........................................................................................................... 24
3Application Interface Specification ................................................................................................... 25
3.1Power Supply ................................................................................................................................. 25
3.1.1Design Guide .......................................................................................................................... 25
3.1.2Recommended Power supply circuit ....................................................................................... 26
3.1.3Voltage monitor ....................................................................................................................... 27
3.2Power on/Power off/Reset Time Sequence .................................................................................... 27
3.2.1Power on Sequence ................................................................................................................. 27
3.2.2Power off Sequence ................................................................................................................ 29
3.2.3Reset Function ........................................................................................................................ 30
3.3UART Interface .............................................................................................................................. 31
3.3.1RI Behavior ............................................................................................................................. 32
3.3.2Design Guide .......................................................................................................................... 33
3.4USB Interface ................................................................................................................................ 34
3.4.1USB Application Guide .......................................................................................................... 35
3.5USIM Interface .............................................................................................................................. 36
3.5.1USIM Pin description ............................................................................................................. 36
3.5.2USIM Application Guide ........................................................................................................ 37
3.5.3Recommend Components of USIM holder ............................................................................. 37
3.6PCM Interface ................................................................................................................................ 38
3.6.1PCM Pin Description .............................................................................................................. 39
3.6.2PCM Signal Description ......................................................................................................... 39
3.6.3Auxiliary PCM (128 KHz PCM clock) ................................................................................... 40
3.6.4Primary PCM (2048 KHz PCM clock) ................................................................................... 41
3.6.5PCM Application Guide .......................................................................................................... 43
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3.7MMC/SD and SDIO Interface ....................................................................................................... 44
3.7.1MMC/SD Interface Pin Description ....................................................................................... 44
3.7.2SDIO Interface Pin Description .............................................................................................. 45
3.7.3SD Design guide ..................................................................................................................... 45
3.8I2C Interface .................................................................................................................................. 46
3.8.1I2C Pin Description ................................................................................................................. 46
3.8.2I2C Signal Description ............................................................................................................ 46
3.8.3I2C Design Guide ................................................................................................................... 46
3.9Keypad Interface ............................................................................................................................ 46
3.9.1Keypad Pin Description .......................................................................................................... 47
3.9.2Keypad Application Guide ...................................................................................................... 47
3.10SPI Interface ............................................................................................................................... 48
3.10.1SPI Pin Description ............................................................................................................. 48
3.11GPIO Interface ........................................................................................................................... 49
3.11.1GPIO Pin Description .......................................................................................................... 49
3.12Network status ............................................................................................................................ 51
3.13Flight mode control .................................................................................................................... 51
3.14Multi-functional interface ........................................................................................................... 52
3.14.1Sink Current Source ............................................................................................................ 52
3.14.2ADC ..................................................................................................................................... 53
3.14.3LDO ..................................................................................................................................... 54
4RF Specification .................................................................................................................................. 55
4.1RF Specification ............................................................................................................................ 55
4.2Antenna Design Guide ................................................................................................................... 58
4.3GNSS (GPS and GLONASS) ........................................................................................................ 59
4.3.1GNSS Technical specification ................................................................................................. 59
4.3.2GNSS Operate Mode .............................................................................................................. 60
4.3.3GNSS Application Guide ........................................................................................................ 60
5Reliability and Operating Characteristics ........................................................................................ 63
5.1Electronic Characteristics .............................................................................................................. 63
5.2Operating Mode ............................................................................................................................. 64
5.2.1Operating Mode ...................................................................................................................... 64
5.2.2Minimize Power Consumption ............................................................................................... 64
5.2.3Sleep mode .............................................................................................................................. 65
5.2.4Minimum functionality mode ................................................................................................. 65
5.3Current Consumption ..................................................................................................................... 65
5.4EMC and ESD Notes ..................................................................................................................... 66
6Guide for Production .......................................................................................................................... 67
6.1Top and Bottom View of SIM7100A ............................................................................................ 67
6.2Typical Solder Reflow Profile ....................................................................................................... 67
6.3Moisture Sensitivity Level (MSL) ................................................................................................. 68
6.4Stencil Foil Design Recommendation ........................................................................................... 69
Appendix .................................................................................................................................................... 70
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A. Reference Design ................................................................................................................................ 70
B. SIM7100A GPIOs List ........................................................................................................................ 71
C. Digital I/O Characteristics ................................................................................................................... 71
D. Related Documents ............................................................................................................................. 72
E. Terms and Abbreviations ..................................................................................................................... 74
F. Safety Caution ...................................................................................................................................... 76
Contact us: ................................................................................................................................................. 77
Shanghai SIMCom Wireless Solutions Ltd. ............................................................................................ 77
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Table Index
Table 1: SIM7100A series frequency bands .................................................................................................................... 10
Table 2: General Feature ................................................................................................................................................. 12
Table 3: Coding schemes and maximum net data rates over air interface ....................................................................... 13
Table 4: Pin definition ..................................................................................................................................................... 16
Table 5: IO Parameters Definition .................................................................................................................................. 17
Table 6: Pin description ................................................................................................................................................... 17
Table 7: VBAT Pin description ....................................................................................................................................... 25
Table 8: Recommended zener diode models ................................................................................................................... 26
Table 9: Power on timing ................................................................................................................................................ 29
Table 10: Power off timing ............................................................................................................................................. 30
Table 11: RESET Pin Electronic Characteristic .............................................................................................................. 31
Table 12: UART Pin description ..................................................................................................................................... 32
Table 13: UART Pin Logic level ..................................................................................................................................... 32
Table 14: USB Pin description ........................................................................................................................................ 34
Table 15: USIM Pin description ...................................................................................................................................... 36
Table 16: USIM Electronic characteristic ....................................................................................................................... 36
Table 17: Amphenol USIM socket pin description ......................................................................................................... 38
Table 18: PCM Pin description ....................................................................................................................................... 39
Table 19: PCM Electronic characteristic ......................................................................................................................... 39
Table 20: Timing parameters ........................................................................................................................................... 41
Table 21: Timing parameters ........................................................................................................................................... 42
Table 22: MMC/SD Pin description ................................................................................................................................ 44
Table 23: MMC/SD Electronic characteristic* ............................................................................................................... 44
Table 24: SDIO Pin description ...................................................................................................................................... 45
Table 25: SDIO Electronic characteristic ........................................................................................................................ 45
Table 26: I2C Pin description .......................................................................................................................................... 46
Table 27: Keypad Pin description ................................................................................................................................... 47
Table 28: Keypad multiplexing function ......................................................................................................................... 48
Table 29: SPI Pin description .......................................................................................................................................... 48
Table 30: SPI Electronic characteristic ........................................................................................................................... 48
Table 31: GPIO Pin description ...................................................................................................................................... 49
Table 32: GPIO Electronic characteristic ........................................................................................................................ 50
Table 23: LED status ....................................................................................................................................................... 51
Table 34: Flight mode status ........................................................................................................................................... 52
Table 35: Sink Current Electronic characteristic ............................................................................................................. 53
Table 36: Electronic Characteristics ................................................................................................................................ 53
Table 37: Electronic characteristic .................................................................................................................................. 54
Table 38: Conducted transmission power ....................................................................................................................... 55
Table 39: Operating frequencies ..................................................................................................................................... 55
Table 40: E-UTRA operating bands ................................................................................................................................ 56
Table 41: Conducted receive sensitivity .......................................................................................................................... 57
Table 42: Reference sensitivity (QPSK) ......................................................................................................................... 57
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Table 43: Absolute maximum ratings .............................................................................................................................. 63
Table 44: Recommended operating ratings ..................................................................................................................... 63
Table 45: Operating temperature ..................................................................................................................................... 63
Table 46: Operating mode ............................................................................................................................................... 64
Table 47: Current consumption ....................................................................................................................................... 65
Table 48: The ESD performance measurement table (Temperature: 25℃, Humidity: 45%) .......................................... 66
Table 49: Moisture sensitivity level and floor life ........................................................................................................... 68
Table 50: SIM7100A GPIOs list ..................................................................................................................................... 71
Table 51: Digital I/O characteristics ................................................................................................................................ 71
Table 52: Related documents .......................................................................................................................................... 72
Table 53: Terms and Abbreviations ................................................................................................................................. 74
Table 54: Safety caution .................................................................................................................................................. 76
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Figure Index
Figure 1: SIM7100A functional architecture ................................................................................................................... 12
Figure 2: Pin view ........................................................................................................................................................... 15
Figure 3: Top dimensions (Unit: mm) ............................................................................................................................. 21
Figure 4: Side dimensions (Unit: mm) ............................................................................................................................ 22
Figure 5: Bottom dimensions (Unit: mm) ....................................................................................................................... 23
Figure 6: Footprint recommendation (Unit: mm) ............................................................................................................ 24
Figure 7: VBAT input application circuit ........................................................................................................................ 25
Figure 8: Reference circuit of the LDO power supply .................................................................................................... 26
Figure 9: Reference circuit of the DCDC power supply ................................................................................................. 27
Figure 10: Power on Timing Sequence ........................................................................................................................... 28
Figure 11: Power off timing sequence ............................................................................................................................. 30
Figure 12: Reset circuit ................................................................................................................................................... 31
Figure 13: RI behaviour in NULL Modem ..................................................................................................................... 32
Figure 14: RI behaviour in FULL Modem ...................................................................................................................... 33
Figure 15: UART Full modem ........................................................................................................................................ 33
Figure 16: UART Null modem........................................................................................................................................ 33
Figure 17: Reference circuit of level shift ....................................................................................................................... 34
Figure 18: USB Reference Circuit with SIM7100A as USB Host Controller. ................................................................ 35
Figure 19: USIM interface reference circuit ................................................................................................................... 37
Figure 20: Amphenol SIM card socket ........................................................................................................................... 38
Figure 21: Synchrony timing .......................................................................................................................................... 40
Figure 22: EXT CODEC to MODULE timing ................................................................................................................ 40
Figure 23: MODULE to EXT CODEC timing ................................................................................................................ 40
Figure 24: Synchrony timing .......................................................................................................................................... 41
Figure 25: EXT CODEC to MODULE timing ................................................................................................................ 42
Figure 26: MODULE to EXT CODEC timing ................................................................................................................ 42
Figure 27: Reference Circuit of PCM Application with Audio Codec ............................................................................ 43
Figure 28: SD interface circuit ........................................................................................................................................ 45
Figure 29: Reference circuit ............................................................................................................................................ 47
Figure 30: Application circuit ......................................................................................................................................... 51
Figure 31: Flight mode switch ........................................................................................................................................ 52
Figure 32: Current drive .................................................................................................................................................. 53
Figure 33: Antenna matching circuit (MAIN_ANT) ....................................................................................................... 58
Figure 34: Antenna matching circuit (AUX_ANT) ......................................................................................................... 59
Figure 35: Active antenna circuit .................................................................................................................................... 61
Figure 36: Passive antenna circuit (Default) ................................................................................................................... 61
Figure 37: Top and bottom view of SIM7100A .............................................................................................................. 67
Figure 38: The ramp-soak-spike reflow profile of SIM7100A ........................................................................................ 68
Figure 39: Reference design ........................................................................................................................................... 70
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Revision History
Data Version Description of change Author
2014-12-11 1.01 Original Yang Hongliang
Li Ya
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1 Introduction
This document describes electronic specifications, RF specifications, function interface, mechanical
characteristic and testing conclusions of the SIMCom SIM7100A module. With the help of this document
and other SIM7100A software application notes, user guides, users can quickly understand and use
SIM7100A module to design and develop applications quickly.
1.1 Product Outline
Designed for global market, SIM7100A is dual-band HSPA/HSPA+, WCDMA 850/ 1900, LTE-FDD
band2/4/5/17. User can choose the module based on the wireless network configuration. In this document,
the entire radio band configuration of SIM7100A series is described in the following table.
Table 1: SIM7100A series frequency bands
Standard Frequency SIM7100A
GSM
GSM 850MHz
EGSM 900MHz
DCS1800MHz
PCS1900MHz
WCDMA
WCDMA 850MHz
WCDMA 900MHz
WCDMA 1900MHz
WCDMA 2100MHz
TD-SCDMA 1880-1920MHz
2010-2025MHz
HSPA HSDPA
HSUPA
HSPA+ HSPA+
DC-HSPA+
GNSS GPS
GLONASS
LTE-FDD
LTE-FDD B1
LTE-FDD B2
LTE-FDD B3
LTE-FDD B4
LTE-FDD B5
LTE-FDD B7
LTE-FDD B8
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LTE-FDD B13
LTE-FDD B17
LTE-FDD B20
LTE-TDD
LTE TDD B38
LTE TDD B39
LTE TDD B40
LTE TDD B41
(100M BW)
With a tiny configuration of 30*30*2.9 mm and integrated functions, SIM7100A can meet almost any
space requirement in users’ application, such as Smart phone, PDA phone, industrial handhelds,
machine-to-machine, vehicle applications, etc.
There are 87 pins on SIM7100A, which provide most application interfaces for customers’ board.
1.2 Hardware Interface Overview
Sub-interfaces are described in detail in the next chapter, which includes:
● Power Supply
● USB Interface
● UART Interface
● MMC/SD and SDIO Interfaces
● USIM Interface
● GPIO
● ADC
● LDO Power Output
● Current Sink Source
● PCM Interface
● Keypad Interface
● SPI Interface
● I2C Interface
1.3 Hardware Diagram
The global architecture of the SIM7100A Embedded module is described in the figure below.
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WCDMA/LTE
RF FEM
RF GSM
WCDMA/LTEPA
RF
Transceiver
Processor
XO
19.2MHz
NAND
Flash
RF WCDMA/LTE-
FDD PA
MMC/SD/SDIO
I2C
PCM
Interrupt
Status LED
USB
USIM
Power On
Reset
UART
GPIOs
ADC
LDO
Vbat*
Vbat* SPI
Keypad(Multiplex with GPIOs)
Sink Current Source
DDR
GNSS
RF
Main Antenna
GNSS Antenna
Power
Management
Qualcomm
Chip
SMT Interface
WCDMA
/LTE
RF FEM
DIV Antenna
Figure 1: SIM7100A functional architecture
1.4 Functional Overview
Table 2: General Feature
Feature Implementation
Power supply Single supply voltage 3.4～4.2V
Power Save mode TBD
Frequency bands Please refer to table 1.
Transmitting power
UMTS:
Class 3 (0.25W): WCDMA,
Class 3 (0.25W): LTE
Connectivity Speed
UMTS R99 speed: 384 kbps DL/UL
HSPA+: 5.76 Mbps(UL), 42 Mbps(DL)
LTE Category 3 - 100 Mbps (DL)
LTE Category 3 - 50 Mbps (UL)
Rx-diversity Support UMTS/LTE Rx-diversity.
GNSS
● GNSS engine (GPS and GLONASS)
● Protocol: NMEA
● Mobile-assisted mode
● Mobile-based mode
● Standalone mode
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SMS
● MT, MO, CB, Text and PDU mode
● SMS storage: USIM card or ME(default)
● Support transmission of SMS alternatively over CSD or GPRS.
User can choose preferred mode.
USIM interface Support identity card: 1.8V, 3V.
USIM application toolkit Support SAT class 3, GSM 11.14 Release 98
Support USAT
Phonebook management Support phonebook types: SM, FD, LD, RC, ON, MC.
Audio features
Support digital audio interface: PCM interface.
● Used for analog audio function with external codec.
● Support long frame sync and short frame sync.
● Support 8-bit A-law, μ-law and 16-bit linear data formats.
● Support master and slave mode, but must be the master in long
frame sync.
UART interface
Default one Full modem serial port
1200bps to 460800bps.
Can be used for AT commands or data stream.
Support RTS/CTS hardware handshake and software ON/OFF
flow control.
Multiplex ability according to GSM 07.10 Multiplexer Protocol.
Autobauding supports baud rate from 1200 bps to 115200bps.
upgrading firmware
MMC/SD/SDIO
● Two secure digital controller (SDC) ports up to 52MHz:
● support MMC and SD cards with 1.8 V or 2.95 V on SD1
● support SDIO with1.8 V only on SD2
USB USB 2.0 specification-compliant as a peripheral or embedded host
Firmware upgrade Firmware upgrade over USB interface
Physical characteristics Size:30*30*2.9mm
Weight:5.7 g
Temperature range
● Normal operation temperature: -30°C to +80°C
● Extended operation temperature: -40°C to +85°C
● Storage temperature -45°C to +90°C
Table 3: Coding schemes and maximum net data rates over air interface
HSDPA device category Max data rate（peak） Modulation type
Category 1 1.2Mbps 16QAM,QPSK
Category 2 1.2Mbps 16QAM,QPSK
Category 3 1.8Mbps 16QAM,QPSK
Category 4 1.8Mbps 16QAM,QPSK
Category 5 3.6Mbps 16QAM,QPSK
Category 6 3.6Mbps 16QAM,QPSK
Category 7 7.2Mbps 16QAM,QPSK
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Category 8 7.2Mbps 16QAM,QPSK
Category 9 10.2Mbps 16QAM,QPSK
Category 10 14.4Mbps 16QAM,QPSK
Category 11 0.9Mbps QPSK
Category 12 1.8Mbps QPSK
Category 13 17.6Mbps 64QAM
Category 14 21.1Mbps 64QAM
Category 15 23.4Mbps 16QAM
Category 16 28Mbps 16QAM
Category 17 23.4Mbps 64QAM
Category 18 28Mbps 64QAM
Category 19 35.5Mbps 64QAM
Category 20 42Mbps 64QAM
Category 21 23.4Mbps 16QAM
Category 22 28Mbps 16QAM
Category 23 35.5Mbps 64QAM
Category 24 42.2Mbps 64QAM
HSUPA device category Max data rate（peak） Modulation type
Category 1 0.96Mbps QPSK
Category 2 1.92Mbps QPSK
Category 3 1.92Mbps QPSK
Category 4 3.84Mbps QPSK
Category 5 3.84Mbps QPSK
Category 6 5.76Mbps QPSK
LTE-FDD device category
(Downlink) Max data rate（peak） Modulation type
Category 1 10Mbps QPSK/16QAM/64QA
M
Category 2 50Mbps QPSK/16QAM/64QA
M
Category 3 100Mbps QPSK/16QAM/64QA
M
Category 4 150Mbps QPSK/16QAM/64QA
M
LTE-FDD device category
(Uplink) Max data rate（peak） Modulation type
Category 1 5Mbps QPSK/16QAM
Category 2 25Mbps QPSK/16QAM
Category 3 50Mbps QPSK/16QAM
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Category 4 50Mbps QPSK/16QAM
2 Package Information
2.1 Pin Configuration
All hardware interfaces which connect SIM7100A to customers’ application platform are through 87 pins
pads (Metal half hole). Figure 2 is SIM7100A outline diagram.
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
21
79
78
77
76
75
74
73
72
71
70
69
68
67
66
65
64
63
62
61
80
SD_CMD
SD_DATA0
SD_DATA1
SD_DATA2
SD_DATA3
SD_CLK
KBC1
KBC0
KBR0
KBR2
KBC2
KBC3
KBR1
KBR4
KBR3
KBC4
GND
GND
VBAT
VBAT
GND
VBAT
VBAT
GND
GND
RTS
CTS
RXD
RI
DCD
TXD
DTR
PCM_OUT
PCM_IN
PCM_SYNC
PCM_CLK
GND
GND
GND
GNSS_ANT
84RF_CFG2
83
RF_CFG1 87 BOOT_CFG1
86 RF_CFG3
Figure 2: Pin view
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Table 4: Pin definition
Pin No. Define Pin No. Define
1 GND 2 GND
3 PWRKEY 4 RESET
5 GND 6 SPI_CLK
7 SPI_MISO 8 SPI_MOSI
9 SPI_CS 10 GND
11 USB_VBUS 12 USB_DN
13 USB_DP 14 GND
15 VDD_1V8 16 USB_ID
17 USIM_DATA 18 USIM_RST
19 USIM_CLK 20 USIM_VDD
21 SD_CMD 22 SD_DATA0
23 SD_DATA1 24 SD_DATA2
25 SD_DATA3 26 SD_CLK
27 KBC1 28 KBC0
29 KBR0 30 KBR2
31 KBC2 32 KBC3
33 KBR1 34 KBR4
35 KBR3 36 KBC4
37 GND 38 VBAT
39 VBAT 40 GND
41 GND 42 NC
43 GND 44 VDD_EXT
45 ISINK 46 ADC2
47 ADC1 48 GPIO44
49 GPIO40 50 GPIO43
51 GPIO1 52 GPIO41
53 GPIO42 54 GPIO4
55 SCL 56 SDA
57 GND 58 GND
59 AUX_ANT 60 GND
61 GND 62 VBAT
63 VBAT 64 GND
65 GND 66 RTS
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67 CTS 68 RXD
69 RI 70 DCD
71 TXD 72 DTR
73 PCM_OUT 74 PCM_IN
75 PCM_SYNC 76 PCM_CLK
77 GND 78 GND
79 GNSS_ANT 80 GND
81 GND 82 MAIN_ANT
83 RF_CFG1 84 RF_CFG2
85 BOOT_CFG0 86 RF_CFG3
87 BOOT_CFG1
2.2 Pin description
Table 5: IO Parameters Definition
Pin Type Description
PI Power input
PO Power output
IO Bidirectional input / output
DI Digital input
DO Digital output
AI Analog input
Table 6: Pin description
Pin name Pin No. I/O Description Comment
Power Supply
VBAT 38,39,
62,63 PI Power supply voltage
NC 42 No connection Please keep open
VDD_EXT 44 PO
LDO power output for SD card
circuit or other external circuit
with MAX. 150mA output. This
LDO output voltage can be
changed by the AT command
“AT+CVAUXV”.
If unused, please keep
open.
VDD_1V8 15 PO 1.8V SMPS output for external
circuit, such as level shift circuit.
Recommend placing a
10uF and 100nF
capacitors to improve
the stability of the
internal 1.8V SMPS
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circuit.
GND
1,2,5,10
,14,37,4
0,41,43,
57,58,6
0,61,64,
65,77,7
8,80,81
Ground
Power on/off
PWRKEY 3 DI
PWRKEY should be pulled low
at least 180ms to power on or
500ms to power off the module.
PWRKEY has been
pulled up to 1.8V in
the module.
SD interface
SD_CMD 21 I/O SDIO command
If unused, please keep
open.
SD_DATA0 22 I/O SDIO data
SD_DATA1 23 I/O SDIO data
SD_DATA2 24 I/O SDIO data
SD_DATA3 25 I/O SDIO data
SD_CLK 26 DO SDIO clock
USIM interface
USIM_DATA 17 I/O SIM Data Output/Input
All signals of SIM
interface should be
protected against
ESD/EMC.
USIM_RST 18 DO SIM Reset
USIM_CLK 19 DO SIM Clock
USIM_VDD 20 PO Voltage Supply for SIM card
Support 1.8V or 3V SIM card
SPI interface
SPI_CLK 6 DO SPI clock
If unused, please keep
open.
SPI_MISO 7 DI SPI (master only) master in/slave
out data
SPI_MOSI 8 DO SPI(master only) master out/slave
in data
SPI_CS 9 DO SPI chip-select
USB
USB_VBUS 11 DI Valid USB detection input
USB_DN 12 I/O
Negative line of the differential,
bi-directional USB signal to/from
the peripheral device.
USB_DP
13 I/O
Positive line of the differential,
bi-directional USB signal to/from
the peripheral device.
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USB_ID 16 DI High-speed USB ID
If SIM7100A is
peripheral (USB
device), please keep it
open. If SIM7100A is
USB host, please
connect to GND
directly.
UART interface
RTS 66 DO Request to send
CTS 67 DI Clear to Send
RXD 68 DI Receive Data
RI 69 DO Ring Indicator
DCD 70 DO Carrier detects
TXD 71 DO Transmit Data
DTR 72 DI DTE get ready
I2C interface
SCL 55 DO I2C clock output
Please place 2
external Pull-up 2.2kR
resistors to VDD_1V8
for using I2C bus.
If unused, keep open.
SDA 56 I/O I2C data
Keypad interface
KBR0 29 DO Bit 0 drive to the pad matrix
All Keypad pins can
be configured as
GPIOs.
KBC0, KBC1, KBC2,
KBC3, KBR0 and
KBR2 can be
configured as SD2,
please refer to SDIO
description for more
details.
If unused, please keep
open.
KBR1 33 DO Bit 1 drive to the pad matrix
KBR2 30 DO Bit 2 drive to the pad matrix
KBR3 35 DO Bit 3 drive to the pad matrix
KBR4 34 DO Bit 4 drive to the pad matrix
KBC0 28 DI Bit 0 for sensing key press on pad
matrix
KBC1 27 DI Bit 1 for sensing key press on pad
matrix
KBC2 31 DI Bit 2 for sensing key press on pad
matrix
KBC3 32 DI Bit 3 for sensing key press on pad
matrix
KBC4 36 DI Bit 4 for sensing key press on pad
matrix
PCM interface
PCM_OUT 73 DO PCM data output. It also can be
multiplexed as GPIO5. If unused, please keep
open.
PCM_IN 74 DI
PCM data input. It also can be
multiplexed as GPIO0 with
module wake/interrupt.
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PCM_SYNC 75 DO
PCM data frame sync signal. It
also can be multiplexed as
GPIO2.
PCM_CLK 76 DO PCM data bit clock. It also can be
multiplexed as GPIO3.
GPIOs
GPIO1 51 DO Output as LED control for
network status.
If unused, keep open.
GPIO4 54 DI Input as RF operating control.
GPIO40 49 DO
Output as operating status
indicating of module.
It also can output a clock signal
for PCM clock source.
GPIO41 52 DO
General input/output. It can be
used as wake/interrupt signal to
host from module
GPIO43 50 DI
General input/output. It can be
used as wake/interrupt signal to
module from host.
GPIO44 48 I/O
General input/output.
It can be configured as SD
detecting.
GPIO42 53 I/O
General input/output.
It can be configured as USIM
card detecting.
RF interface
MAIN _ANT 82 MAIN antenna soldering pad
GNSS_ANT 79 AI GNSS antenna soldering pad
AUX_ANT 59 AI Diversity antenna soldering pad
Other interface
RESET 4 DI System reset input, active low.
ISINK 45 DI Current source of
ground-referenced current sink
If unused, please keep
open.
ADC1 47 AI Analog Digital Converter Input
ADC2 46 AI Analog Digital Converter Input
RF_CFG1 83 I/O
RF control
They are used to
control RF when
SDIO function is
used.
If unused, keep open.
RF_CFG2 84 I/O
RF_CFG3 86 I/O
BOO_CFG0 85 DI
Boot configure
Recommend placing 2
test points for
debugging. Module
will be forced to go
into USB download
mode by connect 85
and 87 pins to
VDD_1V8 during
power up.
BOO_CFG1 87 DI
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2.3 Package Dimensions
The following figure shows mechanical dimensions of SIM7100A.
Figure 3: Top dimensions (Unit: mm)
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Figure 4: Side dimensions (Unit: mm)
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Figure 5: Bottom dimensions (Unit: mm)
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2.4 Footprint Recommendation
Figure 6: Footprint recommendation (Unit: mm)
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3 Application Interface Specification
3.1 Power Supply
The power supply pins of SIM7100A include four VBAT pins (pin 62&63, pin 38&39). VBAT directly
supplies the power to RF and baseband circuit. VBAT directly supplies the power to RF PA and baseband
system. Power Supply Pin
4 VBAT pins are dedicated to connect the supply voltage.
Table 7: VBAT Pin description
Pin type Pin name Min Typ Max Unit
POWER VBAT 3.15 3.8 4.2 V
3.1.1 Design Guide
Make sure that the input voltage at the VBAT pin will never drop below 3.15V even during a transmit
when the current consumption up to more than 700mA. If the power voltage drops below 3.15V, the
module may be shut down automatically. Using large tantalum capacitors (above 300uF) will be the best
way to reduce the voltage drops.
For the consideration of RF performance and system stability, some multi-layer ceramic chip (MLCC)
capacitors (0.1/1uF) need to be used for EMC because of their low ESR in high frequencies. Note that
capacitors should be put beside VBAT pins as close as possible. Also User should minimize the PCB trace
impedance from the power supply to the VBAT pins through widening the trace to 80 mil or more on the
board. The following figure is the recommended circuit.
Figure 7: VBAT input application circuit
Note: The Cd, Ce, Cb, Cc and Cf must be mounted for SIM7100A.For SIM5360 the Ca, Cb ,Ce, Cc and
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Cf must be mounted.
In addition, in order to get a stable power source, it is suggested to use a zener diode of which reverse
zener voltage is 5.1V and dissipation power is more than 500mW.
Table 8: Recommended zener diode models
No. Manufacturer Part Number Power Package
1 On semi MMSZ5231BT1G 500mW SOD123
2 Prisemi PZ3D4V2H 500mW SOD323
3 Vishay MMSZ4689-V 500mW SOD123
4 Crownpo CDZ55C5V1SM 500mW 0805
3.1.2 Recommended Power supply circuit
We recommend DCDC or LDO is used for the power supply of the module, make sure that the peak
current of power components can rise up to more than 2A. The following figure is the reference design of
+5V input power supply. The designed output for the power supply is 3.8V, here a linear regulator can be
used.
Figure 8: Reference circuit of the LDO power supply
If there is a big difference between the input voltage and the desired output (VBAT), a switching converter
power will be preferable because of its better efficiency, especially at the high current situation. The
following figure is the reference circuit. Note that DCDC may deprave RF performance because of ripple
current intrinsically.
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Figure 9: Reference circuit of the DCDC power supply
3.1.3 Vol tage monitor
To monitor the power supply voltage, user can use the AT command “AT+CBC”, this command has two
parameters: the battery status and the voltage value (mV). It will return the capacity percentage and actual
value of battery (at the VBAT pin). The voltage is continuously measured at intervals, whenever the
measured battery voltage is lower than a specific value set by the AT command “AT+CVALARM”. For
example, if the voltage value is set to be 3.4V, the following URC will be presented: “warning! voltage is
low: 3.3v”.
If the voltage is lower than a specific value which is set by the AT command “AT+CPMVT”, the module
will be powered off automatically and AT commands cannot be executed any more.
Note: Under-voltage warning function and under-voltage power-off function are disabled by default.
For more information about these AT command, please refer to Document [1].
3.2 Power on/Power off/Reset Time Sequence
3.2.1 Power on Sequence
SIM7100A can be powered on by PWRKEY pin, which starts normal operating mode.
PWRKEY pin is pulled up with a 200k ohm resistor to 1.8V in module. User can power on the SIM7100A
by pulling the PWRKEY pin down for a short time. The power-on scenarios are illustrated in the following
figures.
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NETLIGHT/GPIO1
(Output)
V
IL
<0.3V
V
IH > 1.6V
TonVBAT
PWRKEY
(Input)
Tpd+
UART Port Undefined Active
USB Port Undefined Active
VDD_EXT
Tpw+
Tuart
Tusb
(Output)
4.7K
47K
Turn on / off
impulse
PWRKEY Power
On / off logic
200K
1.8V
MODULE
Figure 10: Power on Timing Sequence
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Table 9: Power on timing
Symbol Parameter Time value Unit
Min. Typ. Max.
Ton The time to pull PWRKEY down to power on 180 500 - ms
TpD+ The time to indicate connecting with the network - - 5 s
Tpw+ The time to indicate the module is powered on
completely - - 0.5 s
Tuart The time to enable UART - - 8 s
Tusb The time to enable USB - - 10 s
Note: Module could be automatically power on by connecting PWRKEY pin to Low level directly.
Before designing, please refer to Document [27] for more detail.
3.2.2 Power off Sequence
The following methods can be used to power down SIM7100A. These procedures will make module
disconnect from the network and allow the software to enter a safe state, and then save data before
completely powering the module off.
● Method 1: Power off SIM7100A by pulling the PWRKEY pin down
● Method 2: Power off SIM7100A by AT command
User can power off the SIM7100A by pulling PWRKEY down for a specific time. The power off scenario
is illustrated in the following figure.
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NETLIGHT/GPIO1
(Output)
V
IL<0.3V
Toff
PWRKEY
( Input )
Tpd-
UART Port UndefinedActive
USB Port UndefinedActive
VDD_EXT
(Output )Tpw-
Tuart
Tusb
V
IL<0.3V
Ton
Trestart
Figure 11: Power off timing sequence
Table 10: Power off timing
Symbol Parameter Time value
Min. Typ. Max. Unit
Toff The time pulling PWRKEY down to power off 0.5 - 5 s
TpD- The time to indicate disconnecting from the network - - 2 s
Tpw- The time to indicate the module power off completely - - 2 s
Tuart The time to disable UART - - 3 s
Tusb The time to disable USB - - 2 s
Trestart The time to power on again after Tpw- 0 - - s
User can also use the AT command “AT+C POF ” to power down the module. After that, the AT
commands cannot be executed any longer. The module enters the POWER DOWN mode.
VDD_EXT pin can be used to detect whether module is powered on or not. When module is powered
on and firmware goes ready, VDD_EXT will be high level.
Note: For details about “AT+CPOF”, please refer to Document [1].
3.2.3 Reset Function
SIM7100A also have a RESET pin (PIN4) to reset the module. This function is used as an emergency reset
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only when AT command “AT+CPOF” and the PWRKEY pin has no effect. User can pull the RESET pin
to ground, then the module will reset.
This pin is already pulled up in module, so the external pull-up resistor is not necessary. A 100nF capacitor
close to the RESET pin is strongly recommended. A reference circuit is recommended in the following
figure.
Figure 12: Reset circuit
Note
：
50ms<Treset<200ms. ESD components are suggested to be used on Reset pin.
Table 11: RESET Pin Electronic Characteristic
Symbol Description Min Typ Max Unit
VIH Input high level
voltage 1.17 1.8 2.1 V
VIL Input low level
voltage -0.3 0 0.63 V
Treset Low level pulse width 50 100 200 ms
3.3 UART Interface
SIM7100A provides an UART (universal asynchronous serial transmission) port， consisting of a flexible
7-wire serial interface. The module is as the DCE (Data Communication Equipment) and the client PC is
as the DTE (Data Terminal Equipment). AT commands are entered and serial communication is performed
through UART interface.
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Table 12: UART Pin description
Pin type Pin name Pin No. I/O Default Status
UART1
RXD 68 I Pull-Down
TXD 71 O Pull-Up
RTS 66 O Pull-Up
CTS 67 I Pull-Down
DTR 72 I Pull-Up
DCD 70 O Pull-Up
RI 69 O Pull-Up
More pin information refers to chapter 2.2.
Table 13: UART Pin Logic level
Symbol Parameter Min Typ Max Unit
VIH High-level input voltage 1.26 1.8 2.1 V
VIL Low-level input voltage -0.3 0 0.63 V
VOH High-level output voltage 1.35 - 1.8 V
VOL Low-level output voltage 0 0 0.45 V
3.3.1 RI Behavior
If UART port is used in Null Modem, the pin “RI” can be used as an interrupt signal to HOST. Normally it
will keep high logic level until certain condition such as receiving SMS, voice call (CSD, video) or URC
reporting, then “RI” will change to low logic level to inform the master (client PC). It will stay low until
the master clears the interrupt event with AT command.
Figure 13: RI behaviour in NULL Modem
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If Full Modem is used to establish communication between devices, the pin “RI” is another operation
status. Initially it keeps high, when a voice call or CSD call comes, the pin “RI” will change to low for
about 5900ms, then it will return to high level for 100ms. It will repeat this procedure until this call is
answered or hung up.
Figure 14: RI behaviour in FULL Modem
3.3.2 Design Guide
The application circuit is in the following figures.
Figure 15: UART Full modem
Figure 16: UART Null modem
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The SIM7100A UART is 1.8V interface. A level shifter should be used if user’s application is equipped
with a 3.3V UART interface. The level shifter TXB0108RGYR provided by Texas Instruments is
recommended. The reference design of the TXB0108RGYR is in the following figures.
TXD
RXD
RTS
CTS
DTR
DCD
RI A7
A1
A2
A3
A4
A5
A6
MODULE
TXB0108RGYR
UART port
A8
B7
B1
B2
B3
B4
B5
B6
B8
VCCA
OE
VDD_1V8 or
External 1V8
100nF
3.3V
100nF
VCCB
GND
TXD_3.3V
RXD_3.3V
RTS_3.3V
CTS_3.3V
DTR_3.3V
DCD_3.3V
RI_3.3V
47K 47K
Figure 17: Reference circuit of level shift
To comply with RS-232-C protocol, the RS-232-C level shifter chip should be used to connect SIM7100A
to the RS-232-C interface. In this connection, the TTL level and RS-232-C level are converted mutually.
SIMCom recommends that user uses the SP3238ECA chip with a full modem. For more information
please refers to the RS-232-C chip datasheet.
Note: SIM7100A supports the baud rate: 300, 600, 1200, 2400, 4800, 9600, 19200, 38400, 57600,
115200, 230400, 460800, 921600, 3200000, 3686400, 4000000bps. Default rate is 115200bps.
3.4 USB Interface
SIM7100A module contains a USB interface. This interface is compliant with the USB2.0 specification as
a peripheral or embedded host. USB charging is not supported.
Table 14: USB Pin description
Pin name Pin No. Description
USB_VBUS 11 Valid USB detection input ，Valid USB detection voltage is
3.0-5.25V.
USB_DP 13 USB 2.0 specification-compliant as a peripheral or embedded
host
USB_DN 12
USB_ID 16
High-speed USB ID input. If keep USB_ID pin open, SIM7100A
will be a USB device. If tie USB_ID pin to ground, SIM7100A
will be a USB host controller.
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3.4.1 USB Application Guide
Normally, SIM7100A is a USB device. SIM7100A supports the USB suspend and resume mechanism
which can help to save power. If no transaction is on USB bus, SIM7100A will enter suspend mode.
When some events such as voice call or receiving SMS happen, SIM7100A will resume normal mode
automatically.
SIM7100A is a USB host controller.
Figure 18: USB Reference Circuit with SIM7100A as USB Host Controller.
Because of high bit rate on USB bus, please pay attention to influence of junction capacitance of ESD
component on USB data lines. Typically, the capacitance should be less than 1pF ,It is recommended to
use an ESD protection component such as ON SEMI (www.onsemi.com ) ESD9L5.0ST5G.
Note
：
The SIM7100A has two kinds of interface (UART and USB) to connect to host CPU. USB
interface is mapped to five virtual ports: “SIMTECH HS-USB Modem 9001”, “SIMTECH HS-USB
NMEA 9001”, “SIMTECH HS-USB AT port 9001”, “SIMTECH HS-USB Diagnostics 9001” and
“SIMTECH Wireless HS-USB Ethernet Adapter 9001”.
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3.5 USIM Interface
The USIM provides the required subscription verification information to allow the mobile equipment to
attach to a GSM or UMTS network. Both 1.8V and 3.0V SIM Cards are supported.
3.5.1 USIM Pin description
Table 15: USIM Pin description
Table 16: USIM Electronic characteristic
Symbol Parameter 3.0V mode 1.8V mode Unit
Min Typ Max Min Typ Max
USIM_VDD LDO power
output
2.71 2.85 3.05 1.7 1.8 1.9
V
VIH
High-level
input
voltage
0.65·USI
M_VDD - USIM_V
DD +0.3
0.65·USI
M_VDD - USIM_VDD
+0.3 V
VIL
Low-level
input
voltage
-0.3 0 0.3·USI
M_VDD -0.3 0 0.3·USIM_V
DD V
VOH
High-level
output
voltage
2.71 2.85 3.05 1.7 1.8 1.9 V
VOL
Low-level
output
voltage
0 0 0.45 0 0 0.45 V
Pin name Pin Description
USIM_CLK 19 USIM Card Clock
USIM_RST 18 USIM Card Reset
USIM_DATA 17
USIM Card data I/O, which has been pulled up with a 22kR resistor to
USIM_VDD in module. Do not pull up or pull down in users’ application
circuit.
USIM_VDD 20 USIM Card Power output depends automatically on USIM mode，one is
3.0V±10%, another is 1.8V±10%. Current is less than 50mA.
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3.5.2 USIM Application Guide
It is recommended to use an ESD protection component such as ST (www.st.com ) ESDA6V1W5 or ON
SEMI (www.onsemi.com ) SMF05C. Note that the SIM peripheral circuit should be close to the SIM card
socket. The reference circuit of the 6-pin SIM card holder is illustrated in the following figure.
Figure 19: USIM interface reference circuit
Note: USIM_DATA has been pulled up with a 15kohm resistor to USIM_VDD in module. A 220nF shut
capacitor on USIM_VDD is used to reduce interference. Use AT Commands to get information in USIM
card. For more detail, please refer to document [1].
3.5.3 Recommend Components of USIM holder
For 6 pins USIM socket, SIMCom recommend to use Amphenol C707 10M006 512. User can visit
http://www.amphenol.com for more information about the holder.
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Figure 20: Amphenol SIM card socket
Table 17: Amphenol USIM socket pin description
Pin Signal Description
C1 USIM_VDD SIM Card Power supply, it can identify automatically the SIM Card
power mode，one is 3.0V±10%, another is 1.8V±10%.
C2 USIM_RST SIM Card Reset.
C3 USIM_CLK SIM Card Clock.
C5 GND Connect to GND.
C6 VPP
C7 USIM_DATA SIM Card data I/O.
3.6 PCM Interface
SIM7100A provides hardware PCM interface for external codec. The PCM interface enables
communication with an external codec to support hands-free applications. SIM7100A PCM interface can
be used in two modes: the default mode is auxiliary PCM (8 KHz long sync mode at 128 KHz PCM CLK);
the other mode is primary PCM (8 KHz short sync mode at 2048 KHz PCM CLK). In short-sync
(primary PCM) mode, SIM7100A can be a master or a slave. In long-sync (auxiliary PCM) mode,
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SIM7100A is always a master. SIM7100A also supports 3 kinds of coding formats: 8 bits (-law or A-law)
and 16 bits (linear).
Note: PCM interface is multiplexed from GPIO (default setting). The AT command “AT+CPCM” is
used to switch between PCM and GPIO functions. Please refer to document [21] and document [1] for
details.
3.6.1 PCM Pin Description
Table 18: PCM Pin description
Pins Pin No. Description
PCM_OUT 73 PCM data output
PCM_IN 74 PCM data input
PCM_SYNC 75 PCM data synchrony
PCM_CLK 76 PCM data clock
Table 19: PCM Electronic characteristic
Symbol Parameter Min Typ Max Unit
VIH High-level input voltage 1.26 1.8 2.1 V
VIL Low-level input voltage -0.3 0 0.63 V
VOH High-level output voltage 1.35 - 1.8 V
VOL Low-level output voltage 0 0 0.45 V
3.6.2 PCM Signal Description
The default PCM interface in SIM7100A is the auxiliary PCM interface. The data changes on the high
level of PCM_CLK and is sampled at the falling edge of PCM_CLK in one period. Primary PCM is
disabled after every power-on or every reset event. So user must use AT command to enable the primary
PCM mode after powering on or resetting the module every time if user wants to use Primary
PCM.SIM7100A PCM Interface can be operated in Master or Slave mode if it is configured to primary
PCM. In Master Mode, the Module drives the clock and sync signals that are sent to the external codec.
When it is in Slave Mode, the external codec drives the clock and sync signals which are sent to the
module. Both PCM modes are discussed in this section followed by additional PCM topics.
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3.6.3 Auxiliary PCM (128 KHz PCM clock)
-law coding is supported by the auxiliary PCM. The auxiliary codec port operates with standard
long-sync timing and a 128 KHz clock. The AUX_PCM_SYNC runs at 8 KHz with 50% duty cycle.
Most -law codec support the 128 KHz clock.
Figure 21: Synchrony timing
Figure 22: EXT CODEC to MODULE timing
Figure 23: MODULE to EXT CODEC timing
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Table 20: Timing parameters
Parameter Description Min Typ Max Unit
T(auxsync) AUX_PCM_SYNC cycle time – 125 - μs
T(auxsynch) AUX_PCM_SYNC high time 62.4 62.5 - μs
T(auxsyncl) AUX_PCM_SYNC low time 62.4 62.5 - μs
T(auxclk)* AUX_PCM_CLK cycle time - 7.8 – μs
T(auxclkh) AUX_PCM_CLK high time 3.8 3.9 – μs
T(auxclkl) AUX_PCM_CLK low time 3.8 3.9 – μs
T(suauxsync) AUX_PCM_SYNC setup time high before
falling edge of PCM_CLK 1.95 – – μs
T(hauxsync) AUX_PCM SYNC hold time after falling edge
of PCM_CLK 1.95 – – μs
T(suauxdin) AUX_PCM_IN setup time before falling edge
of AUX_PCM_CLK 70 – – ns
T(hauxdin) AUX_PCM_IN hold time after falling edge of
AUX_PCM_CLK 20 – – ns
T(pauxdout) Delay from AUX_PCM_CLK rising to
AUX_PCM_OUT valid – – 50 ns
*Note: T(auxclk) = 1/(128 KHz).
3.6.4 Primary PCM (2048 KHz PCM clock)
SIM7100A also supports 2.048 MHz PCM data and sync timing for -law codec. This is called the
primary PCM interface. User can use AT command to take the mode you want as discussed above.
Figure 24: Synchrony timing
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Figure 25: EXT CODEC to MODULE timing
Figure 26: MODULE to EXT CODEC timing
Table 21: Timing parameters
Parameter Description Min Typ Max Unit
T(sync) PCM_SYNC cycle time – 125 – μs
T(synch) PCM_SYNC high time 400 500 – ns
T(syncl) PCM_SYNC low time – 124.5 – μs
T(clk) PCM_CLK cycle time – 488 – ns
T(clkh) PCM_CLK high time – 244 – ns
T(clkl) PCM_CLK low time – 244 – ns
T(susync) PCM_SYNC setup time high before falling edge of
PCM_CLK 60 – – ns
T(hsync) PCM_SYNC hold time after falling edge of
PCM_CLK 60 – – ns
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T(sudin) PCM_IN setup time before falling edge of
PCM_CLK 50 – – ns
T(hdin) PCM_IN hold time after falling edge of PCM_CLK 10 – – ns
T(pdout) Delay from PCM_CLK rising to PCM_OUT valid – – 350 ns
T(zdout) Delay from PCM_CLK falling to PCM_OUT
HIGH-Z – 160 – ns
Note: SIM7100A can transmit PCM data by USB except for PCM interface.
3.6.5 PCM Application Guide
The mode of SIM7100A PCM can be configured by AT command “AT+CPCM and AT+CPCMFMT”, and
the default configuration is master mode using short sync data format with 2.048MHz PCM_CLK and 8
kHz PCM_SYNC. Please refer to document [21] and document [1] for details.
In addition, the firmware of SIM7100A has integrated the configuration on WM8960GEFL/RV codec
provided by WOLFSON MICROELECTRONICS with I2C interface.
The reference circuit of the reference design of PCM interfaces with external codec IC in the following
figure. It is recommended to use a 26MHz CXO component such as TXC CORPORATION
(www.txccorp.com) 8W26000011.
Figure 27: Reference Circuit of PCM Application with Audio Codec
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3.7 MMC/SD and SDIO Interface
SIM7100A provides one 4-bit SD/MMC interface and one SDIO interface with clock rate up to 52 MHz.
3.7.1 MMC/SD Interface Pin Description
The operation voltage of MMC/SD interface is 2.85V. It supports 1-bit SD/MMC or 4-bit SD data
transmission mode. Though the same hardware controller is used, the initialization procession for SD or
MMC cards is different.
Note: Interface with SD/MMC memory cards up to 32GB
Table 22: MMC/SD Pin description
Table 23: MMC/SD Electronic characteristic*
Symbol Parameter Min Typ Max Unit
VDD_EXT** LDO power output 2.71 2.85 2.99 V
VIH High-level input voltage 0.65·VDD_EXT - VDD_EXT+0.3 V
VIL Low-level input voltage -0.3 0 0.3·VDD_EXT V
VOH High-level output voltage 2.71 2.85 2.99 V
VOL Low-level output voltage 0 0 0.45 V
Note:
*For SD_DATA0-SD_DATA3
，
SD_CLK and SD_CMD
，
GPIO44 is 1.8V operation voltage.
**VDD_EXT must be set with 2.85V output.
Pin name Pin No. Function
SD_DATA0 22 SD/MMC card data0
SD_DATA1 23 SD card data1
SD_DATA2 24 SD card data2
SD_DATA3 25 SD card data3
SD_CLK 26 SD card clock
SD_CMD 21 SD card command
GPIO44 48 SD card detecting
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3.7.2 SDIO Interface Pin Description
Table 24: SDIO Pin description
Table 25: SDIO Electronic characteristic
Symbol Parameter Min Typ Max Unit
VIH High-level input voltage 1.26 1.8 2.1 V
VIL Low-level input voltage -0.3 0 0.63 V
VOH High-level output voltage 1.35 - 1.8 V
VOL Low-level output voltage 0 0 0.45 V
3.7.3 SD Design guide
The module can’t provide power for SD card. External 2.85V LDO is needed with capable of 300mA.
Data lines should be pulled up to VDD_EXT by 10K resistors. ESD/EMI components should be arranged
beside SD card socket. Refer to the following application circuit.
Figure 28: SD interface circuit
Pin name Pin No. Function
KBR2 30 SD2_DATA0
KBC1 27 SD2_DATA1
KBC0 28 SD2_DATA2
KBC2 31 SD2_DATA3
KBR0 29 SD2_CMD
KBC3 32 SD2_CLK
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3.8 I2C Interface
I2C is used to communicate with peripheral equipments and can be operated as either a transmitter or
receiver, depending on the device function. Use AT Commands “AT+CRIIC and AT+CWIIC” to read/write
register values of related peripheral equipments connected with I2C interface. Its operation voltage is
1.8V.
3.8.1 I2C Pin Description
Table 26: I2C Pin description
3.8.2 I2C Signal Description
Both SDA and SCL are bidirectional lines, connected to a positive supply via a pull-up resistor
respectively. When the bus is free, both lines are high.
3.8.3 I2C Design Guide
For SIM7100A, the data on the I2C bus can be transferred at rates up to 400kbps. The number of
peripheral devices connected to the bus is solely dependent on the bus capacitance limit of 400pF. Note
that PCB traces length and bending are in users’ control to minimize load capacitance.
Note
：
SDA and SCL have none pulled up resistors in module. So there is need to pull them up in users’
application circuit.
3.9 Keypad Interface
SIM7100A module provides a keypad interface that supports five sense lines, or columns, and five keypad
rows. The interface generates an interrupt when any key is pressed. Its operation voltage is 1.8V.
Pin name Pin No. Function
SDA 56 Serial interface data input and output
SCL 55 Serial interface clock input
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3.9.1 Keypad Pin Description
Table 27: Keypad Pin description
Pin name Pin No. Function
KBC0 28
Sensing keys
KBC1 27
KBC2 31
KBC3 32
KBC4 36
KBR0 30
Driving pads
KBR1 29
KBR2 30
KBR3 35
KBR4 34
3.9.2 Keypad Application Guide
All keypad pins can be configured for GPIOs. These GPIOs also support interruption operation if used as
input pins. A typical circuit about the keypad (5*5 keypad matrix) is shown in the following figure.
KBR4
KBR3
KBR2
KBR1
KBR0
KBC0
KBC1
KBC2
KBC3
KBC4
Figure 29: Reference circuit
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If these pins are configured for GPIOs, the sequence is listed in the following table.
Table 28: Keypad multiplexing function
Pin name Pin number Mode 0(default) Mode 1
KBR4 34 KBR4 GPIO6
KBR3 35 KBR3 GPIO7
KBR2 30 KBR2 GPIO8
KBR1 33 KBR1 GPIO9
KBR0 29 KBR0 GPIO10
KBC4 36 KBC4 GPIO11
KBC3 32 KBC3 GPIO12
KBC2 31 KBC2 GPIO13
KBC1 27 KBC1 GPIO14
KBC0 28 KBC0 GPIO15
Note: Refer to document [23] for detailed information of Keypad Application Note.
3.10 SPI Interface
SPI interface of SIM7100A is master only. It provides a duplex, synchronous, serial communication link
with peripheral devices. Its operation voltage is 1.8V, with clock rates up to 26 MHz.
3.10.1 SPI Pin Description
Table 29: SPI Pin description
Table 30: SPI Electronic characteristic
Symbol Parameter Min Typ Max Unit
VIH High-level input voltage 1.26 1.8 2.1 V
Pin name Pin No. Function
SPI_CS 9 SPI chip-select; not mandatory in a point-to-point connection
SPI_MISO 7 SPI master in/slave out data
SPI_CLK 6 SPI clock
SPI_MOSI 8 SPI master out/slave in data
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VIL Low-level input voltage -0.3 0 0.63 V
VOH High-level output voltage 1.35 - 1.8 V
VOL Low-level output voltage 0 0 0.45 V
3.11 GPIO Interface
SIM7100A provides a limited number of GPIO pins. All GPIOs can be configured as inputs or outputs.
User can use AT Commands to read or write GPIOs status. Refer to ATC document for details.
3.11.1 GPIO Pin Description
Table 31: GPIO Pin description
Note: If more GPIOs need to be used, users can configure GPIO on other multiple function interfaces,
such as PCM. Please refer to GPIO list.
Pin name Pin No. I/O Function
GPIO1 51 O Output PIN as LED control for network status. If
unused, please keep open.
GPIO4 54 I
Input PIN as RF operating control.
H: Normal Mode L:Flight Mode
If unused, please keep open .
GPIO40 49 O
Output PIN as operating status indicating of module.
H: Power on L: Power off
It also can output a clock signal for PCM clock source.
If unused, left open.
GPIO41 52 I/O
General input/output PIN. It can be used as
wake/interrupt signal to host from module If unused,
left open.
GPIO42 53 I/O General Purpose Input/Output Port.
It can be configured as USIM card detecting.
GPIO43 50 I/O
General Purpose Input/Output Port. It can be used as
wake/interrupt signal to module from host. If unused,
left open.
GPIO44 48 I/O General Purpose Input/Output Port.
It can be configured as SD detecting.
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Table 32: GPIO Electronic characteristic
Symbol Parameter Min Typ Max Unit
VIH High-level input voltage 1.26 1.8 2.1 V
VIL Low-level input voltage -0.3 0 0.63 V
VOH High-level output voltage 1.35 - 1.8 V
VOL Low-level output voltage 0 0 0.45 V
Note: The output driver current of GPIOs is 2mA.
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3.12 Network status
GPIO1 is used to control Network Status LED; application circuit is shown below.
Figure 30: Application circuit
Note: The value of resistor Rx depends on LED characteristic.
Table 33: LED status
LED Status Module Status
Always On Searching Network/Call Connect
200ms ON, 200ms OFF Data Transmit
800ms ON, 800ms OFF Registered network
Off Power off / Sleep
3.13 Flight mode control
GPIO4 controls SIM7100A module to enter or exit the Flight mode. In Flight mode, SIM7100A closes RF
function to prevent interference with other equipments or minimize current consumption. Bidirectional
ESD protection component is suggested to add on GPIO4.
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Figure 31: Flight mode switch
Table 34: Flight mode status
GPIO4 Status Module operation
Low Level Flight Mode: RF is closed.
High Level Normal Mode: RF is working.
Note
：
1. For SIM7100A, GPIO0, GPIO2, GPIO3 and GPIO5 have multiplex function, user can use
them as PCM interface to connect extend codec. Refer to section 3.11 and document [1] for details.
2. When the module is powered off, make sure all digital interfaces (PCM UART, etc) connected with
peripheral devices have no voltage higher than 0.3V. If users’ design cannot meet above conditions,
high level voltages maybe occur in GPIO pins because current leakage from above digital interfaces
may occur.
3.14 Multi-functional interface
SIM7100A merges functions for various applications. It can enrich users’ design and lower the cost of
users’ hardware.
3.14.1 Sink Current Source
The dedicated pin (ISINK) is intended for driving passive devices，such as LCD backlight, this
implementation is VBAT tolerant and suitable for driving white LEDs. The high-current driver can
maintain a constant current which is set by the AT command “AT+ CLEDITST”, capable of up to 40 mA.
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Table 35: Sink Current Electronic characteristic
Symbol Description Min Typ Max Unit
ISINK Input voltage 0.5 VDD VBAT V
IO Input current 5 - 40 mA
Since the driver is ground-referenced current sink, the operating device it drives must form a current path
between the VDD pin and the ISINK pin. The following figure is for users reference.
MODULE
ISINK
Pin 45 is VBAT tolerant-
suitable for driving white
LEDs
Current Controls
Passive
device
+
-
VBAT
High
current
Figure 32: Current drive
Note: The sinking current can be adjusted to meet design requirement through the AT command “AT+
CLEDITST =<0>, <value>”.The “value” ranges from 0 to 15,on behalf of the current changes from
0mA to 150mA in steps of 10mA.
3.14.2 ADC
SIM7100A has a dedicated ADC that is available for digitizing analog signals such as battery voltage and
so on; it is on PIN 47 and PIN 46 , namely ADC1 and ADC2 . This ADC is 15 bit
successive-approximation circuit, and electronic specification is shown in the following table.
Table 36: Electronic Characteristics
Specification Min Typ Max Unit Comments/Conditions
Resolution 15 Bits
Analog input bandwidth – 100 – kHz Analog Vdd = ADC reference
2.4MHz sample rate
Gain Error -2.5 +2.5 %
Offset Error -3.5 +3.5 LSB
Input Range GND 2.2V V
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Input serial resistance 2 kΩ Sample and hold switch resistance
Power supply current
Normal operation 1.5 mA
Power supply current
Off 50 200 nA
User can introduce a signal in the ADC pin directly and use the AT command “AT+CADC” to get the raw
data which is between 0 and 32768. The data can be transformed to any type such as voltage, temperature
etc. Please refer to document [1].
Note: The input signal voltage value in ADC must not be higher than 2.2V.
3.14.3 LDO
SIM7100A has a LDO power output, namely VDD_EXT. The LDO is available and output voltage is
2.85v by default, rated for 150mA. User can switch the LDO on or off by the AT command
“AT+CVAUXS” and configure its output voltage by the AT command “AT+CVAUXV”.
Table 37: Electronic characteristic
Symbol Description Min Typ Max Unit
VDD_EXT Output voltage 1.7 2.85 3.05 V
IO Output current - - 50 mA
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4 RF Specification
4.1 RF Specification
Table 38: Conducted transmission power
Frequency Max Min
GSM850 33dBm ±2dB 5dBm ± 5dB
E-GSM900 33dBm ±2dB 5dBm ± 5dB
DCS1800 30dBm ±2dB 0dBm ± 5dB
PCS1900 30dBm ±2dB 0dBm ± 5dB
GSM850 (8-PSK) 27dBm ±3dB 5dBm ± 5dB
E-GSM900 (8-PSK) 27dBm ±3dB 5dBm ± 5dB
DCS1800 (8-PSK) 26dBm +3/-4dB 0dBm ±5dB
PCS1900(8-PSK) 26dBm +3/-4dB 0dBm ±5dB
WCDMA 2100 24dBm +1/-3dB -56dBm ±5dB
WCDMA 1900 24dBm +1/-3dB -56dBm ±5dB
WCDMA 850 24dBm +1/-3dB -56dBm ±5dB
WCDMA 900 24dBm + 1/-3dB -56dBm ±5dB
TDSCDMA A 24dBm + 1/-3dB -56dBm ±5dB
TDSCDMA B 24dBm + 1/-3dB -56dBm ±5dB
LTE-FDD B1 23dBm +2.7dB -50dBm ±5dB
LTE-FDD B2 23dBm +2.7dB -50dBm ±5dB
LTE-FDD B3 23dBm +2.7dB -50dBm ±5dB
LTE-FDD B4 23dBm +2.7dB -50dBm ±5dB
LTE-FDD B5 23dBm +2.7dB -50dBm ±5dB
LTE-FDD B7 23dBm +2.7dB -50dBm ±5dB
LTE-FDD B8 23dBm +2.7dB -50dBm ±5dB
LTE-FDD B13 23dBm +2.7dB -50dBm ±5dB
LTE-FDD B17 23dBm +2.7dB -50dBm ±5dB
LTE-FDD B20 23dBm +2.7dB -50dBm ±5dB
LTE-TDD B38 23dBm +2.7dB -50dBm ±5dB
LTE-TDD B39 23dBm +2.7dB -50dBm ±5dB
LTE-TDD B40 23dBm +2.7dB -50dBm ±5dB
LTE-TDD B41 23dBm +2.7dB -50dBm ±5dB
Table 39: Operating frequencies
Frequency Receiving Transmission
GSM850 869 ～894 MHz 824 ～849 MHz
E-GSM900 925 ～960 MHz 880 ～915 MHz
DCS1800 1805～1880 MHz 1710～1785 MHz
PCS1900 1930～1990 MHz 1850～1910 MHz
WCDMA 2100 2110～2170 MHz 1920～1980 MHz
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WCDMA1900 1930～1990 MHz 1850～1910 MHz
WCDMA 850 869 ～894 MHz 824 ～849 MHz
WCDMA 900 925 ～960 MHz 880 ～915 MHz
TDSCDMA 1900 1880～1920 MHz 1880～1920 MHz
TDSCDMA 2000 2010～2025 MHz 2010～2025 MHz
LTE Operating frequencies are shown in following table 34.
Note: Operating frequencies of LTE TDD B41 for SIM7100AC is 100MHz BW, 2555～2655
MHz
GPS L1 BAND 1574.4 ～1576.44 MHz -
GLONASS 1598 ～1606 MHz -
Table 40: E-UTRA operating bands
E-UTRA
Operating
Band
Uplink (UL) operating band Downlink (DL) operating
band Duplex
Mode
BS receive / UE transmit(UL) BS transmit / UE receive(DL)
1 1920 MHz~1980 MHz 2110 MHz~2170 MHz FDD
2 1850 MHz~1910 MHz 1930 MHz~1990 MHz FDD
3 1710 MHz~1785 MHz 1805 MHz~1880 MHz FDD
4 1710 MHz~1755 MHz 2110 MHz~2155 MHz FDD
5 824 MHz~849 MHz 869 MHz~894MHz FDD
61 830 MHz~840 MHz 875 MHz~885 MHz FDD
7 2500 MHz~2570 MHz 2620 MHz~2690 MHz FDD
8 880 MHz~915 MHz 925 MHz~960 MHz FDD
9 1749.9 MHz~1784.9 MHz 1844.9 MHz~1879.9 MHz FDD
10 1710 MHz~1770 MHz 2110 MHz~2170 MHz FDD
11 1427.9 MHz~1447.9 MHz 1475.9 MHz~1495.9 MHz FDD
12 699 MHz~716 MHz 729 MHz~746 MHz FDD
13 777 MHz~787 MHz 746 MHz~756 MHz FDD
14 788 MHz~798 MHz 758 MHz~768 MHz FDD
17 704 MHz~716 MHz 734 MHz~746 MHz FDD
18 815 MHz~830 MHz 860 MHz~875 MHz FDD
19 830 MHz~845 MHz 875 MHz~890 MHz FDD
20 832 MHz~862 MHz 791 MHz~821 MHz FDD
21 1447.9 MHz~1462.9 MHz 1495.9 MHz~1510.9 MHz FDD
22 3410 MHz~3490 MHz 3510 MHz~3590 MHz FDD
23 2000 MHz~2020 MHz 2180 MHz~2200 MHz FDD
24 1626.5 MHz~1660.5 MHz 1525 MHz~1559 MHz FDD
25 1850 MHz~1915 MHz 1930 MHz~1995 MHz FDD
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26 814 MHz~849 MHz 859 MHz~894 MHz FDD
27 807 MHz~824 MHz 852 MHz~869 MHz FDD
28 703 MHz~748 MHz 758 MHz~803 MHz FDD
31 452.5 MHz~457.5 MHz 462.5 MHz~467.5 MHz FDD
33 1900 MHz~1920 MHz 1900 MHz~1920 MHz TDD
34 2010 MHz~2025 MHz 2010 MHz~2025 MHz TDD
35 1850 MHz~1910 MHz 1850 MHz~1910 MHz TDD
36 1930 MHz~1990 MHz 1930 MHz~1990 MHz TDD
37 1910 MHz~1930 MHz 1910 MHz~1930 MHz TDD
38 2570 MHz~2620 MHz 2570 MHz~2620 MHz TDD
39 1880 MHz~1920 MHz 1880 MHz~1920 MHz TDD
40 2300 MHz~2400 MHz 2300 MHz~2400 MHz TDD
41 2496 MHz~2690 MHz 2496 MHz~2690 MHz TDD
42 3400 MHz~3600 MHz 3400 MHz~3600 MHz TDD
43 3600 MHz~3800 MHz 3600 MHz~3800 MHz TDD
44 703 MHz~803 MHz 703 MHz~803 MHz TDD
Table 41: Conducted receive sensitivity
Frequency Receive sensitivity
WCDMA 2100 < -110dBm
WCDMA 1900 < -110dBm
WCDMA 850 < -110dBm
WCDMA 900 < -110dBm
LTE FDD/TDD See table 36.
Table 42: Reference sensitivity (QPSK)
Channel bandwidth
E-UTRA Band 1.4 MHz
(dBm)
3 MHz
(dBm)
5 MHz
(dBm)
10 MHz
(dBm)
15 MHz
(dBm)
20 MHz
(dBm)
Duplex
Mode
2 -102.7 -99.7 -98 -95 -93.2 -92 FDD
4 -104.7 -101.7 -100 -97 -95.2 -94 FDD
5 -103.2 -100.2 -98 -95 FDD
17 - - -97 -94 FDD
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4.2 Antenna Design Guide
SIM7100A provides RF antenna interface. Customer’s antenna should be located in the host board and
connected to module’s antenna pad through micro-strip line or other types of RF trace and the trace
impedance must be controlled in 50Ω. The maximum gain of the LTE B2/WCDMA B2 antenna gain
should not exceed 3.4dBi, LTE B4 antenna gain should not exceed 1.9 dBi, LTE B5/WCDMA B5 antenna
gain should not exceed 2.8 dBi, LTE B17 antenna gain should not exceed 1dBi considering the SAR radio.
SIMCom recommends that the total insertion loss between the antenna pad and antenna should meet the
following requirements. No antenna gain may be used that would exceed the 2W EIRP power limit in
1900MHz band.The input impendence of the antenna should be 50Ω, and the VSWR should be less than 2.
● WCDMA 2100/1900<0.9dB
● WCDMA 900/850<0.5 dB
● LTE (F<1GHz) <0.5dB
● LTE (1GHz<F<2GHz) <0.9dB
● LTE (2GHz<F) <1.2dB
To facilitate the antenna tuning and certification test, a RF connector and an antenna matching circuit
should be added. The following figure is the recommended circuit.
Figure 33: Antenna matching circuit (MAIN_ANT)
In this figure, the components R4,C3,C4 and R4 is used for antenna matching, the value of components
can only be got after the antenna tuning, usually, they are provided by antenna vendor. By default, the R3,
R4 are 0 Ohm resistors, and the C3, C4 are reserved for tuning.
The RF test connector in the figure is used for the conducted RF performance test, and should be placed as
close as to the module’s antenna pin. The traces impedance between components must be controlled in
50ohm.
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Figure 34: Antenna matching circuit (AUX_ANT)
In above figure, R1, C1, C2 and R2 are used for diversity antenna matching. By default, the R1, R2 are 0
Ohm resistors, and the C1, C2 are reserved for tuning.
4.3 GNSS (GPS and GLONASS)
SIM7100A merges GNSS (GPS/GLONASS) satellite and network information to provide a
high-availability solution that offers industry-leading accuracy and performance. This solution performs
well, even in very challenging environmental conditions where conventional GNSS receivers fail, and
provides a platform to enable wireless operators to address both location-based services and emergency
mandates.
4.3.1 GNSS Technical specification
Tracking sensitivity -159 dBm（GPS） -158 dBm（GLONASS）
Cold-start sensitivity -148 dBm
Accuracy (Open Sky) 2.5m (CEP50)
TTFF (Open Sky) Hot start <1s Cold start 35s
Receiver Type 16-channel, C/A Code
GPS L1 Frequency (1575.42±1.023MHz),
GLONASS: 1597.5~1605.8 MHz
Update rate Default 1 Hz
GNSS data format NMEA-0183
GNSS Current consumption (WCDMA/GSM Sleep mode) 100mA (Total supply current)
GNSS antenna Passive/Active antenna
Note: Performance will vary depending on the environment, antenna type and signal conditions and so
on.
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4.3.2 GNSS Operate Mode
SIM7100A supports both A-GPS and S-GPS, and then provides three operating modes: mobile-assisted
mode, mobile-based mode and standalone mode. A-GPS includes mobile-assisted and mobile-based mode.
In mobile-assisted mode, when a request for position location is issued, available network information is
provided to the location server (e.g. Cell-ID) and assistance is requested from the location server. The
location server sends the assistance information to the handset. The handset/mobile unit measures the
GNSS observables and provides the GNSS measurements along with available network data (that is
appropriate for the given air interface technology) to the location server. The location server then
calculates the position location and returns results to the requesting entity.
In mobile-based mode, the assistant data provided by the location server encompasses not only the
information required to assist the handset in measuring the satellite signals, but also the information
required to calculate the handset’s position. Therefore, rather than provide the GNSS measurements and
available network data back to the location server, the mobile calculates the location on the handset and
passes the result to the requesting entity.
In standalone (autonomous) mode, the handset demodulates the data directly from the GNSS satellites.
This mode has some reduced cold-start sensitivity, and a longer time to first fix as compared to the assisted
modes. However, it requires no server interaction and works out of network coverage.
This combination of GNSS measurements and available network information provides:
● High-sensitivity solution that works in all terrains: Indoor, outdoor, urban, and rural
● High availability that is enabled by using both satellite and network information
Therefore, while network solutions typically perform poorly in rural areas and areas of poor cell
geometry/density, and while unassisted, GNSS-only solutions typically perform poorly indoors. The
SIM7100A GNSS solution provides optimal time to fix, accuracy, sensitivity, availability, and reduced
network utilization in both of these environments, depending on the given condition.
4.3.3 GNSS Application Guide
Users can adopt an active antenna or a passive antenna as GNSS signal transceiver. In this document, all
GNSS specification mentioned is from passive antenna. The following is the reference circuit.
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Figure 35: Active antenna circuit
Figure 36: Passive antenna circuit (Default)
In above figures, the components C1 and L1, L2 are used for antenna matching, the values of the
components can only be obtained after the antenna tuning usually, and they are provided by antenna
vendor.C2 in Figure 35 is used for DC isolation. In active antenna circuit, users must use an external
LDO/DCDC to provide VDD voltage whose value should be taken according active antenna characteristic,
and VDD can be shut down to avoid consuming additional current when not being used.
GNSS can be used by NMEA port. User can select NMEA as output through UART or USB. NMEA
sentences are automatic and no command is provided. NMEA sentences include GSV, GGA, RMC, GSA,
and VTG. Before using GNSS, user should configure SIM7100A in proper operating mode by AT
command. Please refer to related document for details. SIM7100A can also get position location
information through AT directly.
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Note: GNSS is closed by default, it could be started by AT+CGPS. The AT command has two parameters,
the first is on/off, and the second is GNSS mode. Default mode is standalone mode.
AGPS mode needs more support from the mobile telecommunication network. Refer to AGPS
application document for details.
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5 Reliability and Operating Characteristics
5.1 Electronic Characteristics
Absolute maximum rating for digital and analog pins of SIM7100A are listed in the following table:
Table 43: Absolute maximum ratings
Parameter Min Max Unit
Voltage at digital pins (1.8v digital I/O) -0.3 2.1 V
Voltage at VBAT -0.5 6.0 V
Voltage at VRTC 2 3.25 V
Voltage at USB_VBUS -0.5 6.0 V
Table 44: Recommended operating ratings
Parameter Min Typ Max Unit
Voltage at digital pins (1.8v digital I/O) 0 1.8 1.95 V
Voltage at VBAT 3.4 3.8 4.2 V
Voltage at VRTC 2 - 3.2 V
Voltage at USB_VBUS 3 5 5.25 V
The operating temperature and power specification is listed in the following table.
Table 45: Operating temperature
Parameter Min Typ Max Unit
Normal operation temperature -30 25 80 ℃
Extended operation temperature -40 25 85 ℃
Storage temperature -45 25 +90 ℃
Note: The module is fully functional in all the temperature range. Temperatures outside of the range
-30℃ ~ +80℃ might slightly deviate from ETSI specifications.
Functional: the module is able to make and receive voice calls, data calls, SMS and make
GPRS/WCDMA/HSPA+ traffic.
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5.2 Operating Mode
5.2.1 Operating Mode
The table below summarizes the various operating modes of SIM7100Ax.
Table 46: Operating mode
Mode Status Function
Normal
operati
on
Sleep WCDMA
/LTE
Module will automatically go into sleep mode if the
conditions of sleep mode are enabling and there is no on air
and no hardware interrupt (such as USB wake-up operation or
data on serial port).
In this case, the current consumption of module will be
reduced to the minimal level.
In sleep mode, the module can still receive paging message
and SMS.
Idle WCDMA/LT
E
Software is active. Module is registered to the WCDMA/LTE
network, and the module is ready to communicate.
Talk WCDMA
Connection between two subscribers is in progress. In this
case, the power consumption depends on network settings
such as DTX off/on, FR/EFR/HR, hopping sequences,
antenna.
Standby
EDGE/HSPA
+/LTE
Module is ready for EDGE/HSPA+ /LTE data transfer, but no
data is currently sent or received. In this case, power
consumption depends on network settings and EDGE/HSPA+
/LTE configuration.
Data
transfer HSPA+ /LTE
There is EDGE/HSPA+/LTE data transfer in progress. In this
case, power consumption is related to network settings (e.g.
power control level); uplink/downlink data rates and GPRS
configuration (e.g. used multi-slot settings).
Minimum
functionality mode
AT command “AT+CFUN” can be used to set the module to a minimum
functionality mode without removing the power supply. In this mode, the RF
part of the module will not work or the USIM card will not be accessible, or
both RF part and USIM card will be closed, and the serial port is still
accessible. The power consumption in this mode is lower than normal mode.
5.2.2 Minimize Power Consumption
There are two modes that SIM7100A achieves low power consumption.
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5.2.3 Sleep mode
If peripheral equipments stops working, and there is no on air or hardware interrupts (such as GPIO
interrupts or data on UART), SIM7100A will enter sleep mode automatically. In this mode, SIM7100A can
still receive paging，voice call or SMS from network. If USB interface of SIM7100A is connected to host
CPU, but host CPU does not support USB suspending, then SIM7100A will not enter sleep mode. After
USB is disconnected, SIM7100A will enter sleep mode.
Note: When UART interface is connected with host CPU, SIM7100A cannot enter sleep mode until
RXD is pulled down by the host CPU. If the module is in the idle mode, make sure to pull the RXD to
low level by host CPU. SIMCom recommends using GPIO43 or DTR to wake up the module from host
CPU and to use GPIO41 or RI to wake up the host CPU. Before designing, pay attention to how to
realize waking function and refer to Document[24] and Document[25] for more detail.
5.2.4 Minimum functionality mode
Minimum functionality mode ceases a majority function of module, thus minimizing the power
consumption. This mode is set by the AT command which provides a choice of the functionality levels.
● AT+CFUN=0: Minimum functionality
● AT+CFUN=1: Full functionality (Default)
● AT+CFUN=4: Disable RF function of the module (Flight mode)
If SIM7100A has been set to minimum functionality mode, the module will firstly enter sleep mode, then
the RF function and SIM card function will be closed. In this case, the serial port is still accessible, but RF
function or SIM card will be unavailable. When SIM7100A is in minimum functionality or flight mode, it
can return to full functionality by the AT command “AT+CFUN=1”.
5.3 Current Consumption
The current consumption in suspended mode and without USB connection is listed in the table below.
Here, “suspended mode” means that SIM7100A is connected to USB bus, but it does not transfer data.
Table 47: Current consumption
OFF state
OFF state supply current Power down 10uA
UMTS Sleep/Idle Mode (without USB connection)
WCDMA supply current
(GNSS off)
Sleep mode@DRX=9 1.1 mA
Sleep mode @DRX=8 1.3 mA
Sleep mode @DRX=6 2.8 mA
Idle mode @DRX=6 15 mA
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UMTS Sleep/Idle Mode (with USB suspended)
WCDMA supply current
(GNSS off)
Sleep mode @DRX=9 1.3 mA
Sleep mode @DRX=8 1.6 mA
Sleep mode @DRX=6 3.1 mA
Idle mode @DRX=6 32 mA
UMTS Talk
WCDMA 1900
@Power 23dBm Typical 460 mA
@Power 21dBm Typical 440 mA
@Power 10dBm Typical 280 mA
WCDMA 850
@Power 23dBm Typical 440 mA
@Power 21dBm Typical 400 mA
@Power 10dBm Typical 250 mA
HSDPA Data
WCDMA 1900 @Power 23dBm CQI=22 Typical 510 mA
WCDMA 850 @Power 23dBm CQI=22 Typical 460 mA
LTE Data
LTE-FDD B2 @Power 23dBm 20MHz 100RB Typical 520 mA
LTE-FDD B4 TBD
LTE-FDD B5 TBD
LTE-FDD B17 TBD
5.4 EMC and ESD Notes
EMC tests should be performed to detect any potential problems. Possible harmful emissions radiate by
the application to the RF receiver in the receiver band. RF emissions interfere with audio input/output. It is
recommended to shield the sensitive components and trace with common ground and user can add beads
where necessary.
Normally SIM7100A is mounted on customer host board. Although some ESD components have been
added in SIM7100A, to prevent ESD, user should put some ESD components on customers’ board. The
ESD components should be placed beside the connectors which human body might touch, such as SIM
card holder, audio jacks, switches, keys, etc. The following table is the SIM7100A ESD measurement
performance; the results are from SIMCom EVB test.
Table 48: The ESD performance measurement table (Temperature: 25℃, Humidity: 45%)
Part Contact discharge Air discharge
VBAT,GND TBD TBD
UART,USB TBD TBD
Antenna port TBD TBD
Other PADs TBD TBD
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6 Guide for Production
6.1 Top and Bottom View of SIM7100A
Figure 37: Top and bottom view of SIM7100A
These test points are only used for module manufacturing and testing. They are not for customer’s
application.
6.2 Typical Solder Reflow Profile
For customer convenience, SIMCom provides a typical example for a commonly used soldering profile. In
final board assembly, the typical solder reflow profile will be determined by the largest component on the
board, as well as the type of solder/flux used and PCB stack-up. Therefore the soldering profile shown
below is only a generic recommendation and should be adjusted to the specific application and
manufacturing constraints.
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Figure 38: The ramp-soak-spike reflow profile of SIM7100A
For details about secondary SMT, please refer to document [26].
6.3 Moisture Sensitivity Level (MSL)
SIM7100A is qualified to Moisture Sensitivity Level (MSL) 5 in accordance with JEDEC J-STD-033.
After the prescribed time limit exceeded, users should bake modules for 192 hours in drying equipment
(<5% RH) at 40° C +5° C/-0° C, or 72 hours at 85° C +5° C/-5° C. Note that plastic tray is not
heat-resistant, users must not use the tray to bake at 85° C or the tray may be damaged.
Table 49: Moisture sensitivity level and floor life
Moisture Sensitivity Level
(MSL)
Floor Life (out of bag) at factory ambient≤30°C/60% RH or as
stated
1 Unlimited at ≦30℃/85% RH
2 1 year
2a 4 weeks
3 168 hours
4 72 hours
5 48 hours
5a 24 hours
6 Mandatory bake before use. After bake, it must be reflowed within the
time limit specified on the label.
NOTE: For product handling, storage, processing, IPC / JEDEC J-STD-033 must be followed.
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6.4 Stencil Foil Design Recommendation
The recommended thickness of stencil foil is more than 0.15mm.
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Appendix
A. Reference Design
C103C102C101
VBAT
VBAT
AUX_ANT
Power supply
100uF 100nF 22pF
TXD
RXD
CTS
RTS
RI
DCD
DTR
C109
220nF
USIM_VDD
USIM_RST
USIM_CLK
USIM_DATA
62
63
59
Power supply
R101
61
64
GND
GND
41
GND
POWERKEY
RESET
3
4
Reset impulse
20~200ms
4.7K
47K
Turn on/off impulse
>50ms
UART_TXD
UART_RXD
UART_CTS
UART_RTS
UART_RI
UART_DCD
UART_DTR
71
68
67
66
69
70
72
23
1GND
GND
0R
C107C106
Main Antenna
NC NC
MAIN_ANT
82
58
GND
GND
57
C108
GNSS Antenna
33pF
GNSS_ANT 79
78
GND
GND
77 NC
L101
NC
L102
GND 80
GND
60
SIM_DATA
SIM_VDD
SIM_RST
SIM_CLK
ESDA6V1W5
SD_DATA3
SD_CLK
SD_DATA2
SD_DATA1
SD_CMD
SD_DATA0
24
26
25
22
21
GPIO4
USB_VBUS
RF ON/OFF
11
12
GPIO1
10K
10K
300R
LED
Network
Status
USB_DP 13
32
USB_DN
USB_VBUS
USB_DN
USB_DP
28
27
31
36
29
33
35
30
34
KBC0
KBC2
KBC1
KBC3
KBR0
KBC4
KBR1
KBR3
KBR2
KBR4
76
74
75
73
6
7
9
8
45
PCM_IN/GPIO0
PCM_OUT/GPIO5
PCM_SYNC/GPIO2
PCM_CLK/GPIO3
SPI_CLK
SPI_MISO
SPI_CS
SPI_MOSI
ISINK
123
456
789
*0#
Audio CODEC Chip
or
DSP
LCD
Display
52
54
VDD_EXT
VDD_EXT 44
SCL I2C_SCL
55
SDA I2C_SDA
56
ADC1 HKADC
Input range:0-2.2V
ADC2
47
46
VDD_1V8
USB_ID
15
16
NC
17
19
18
20
42
C108
If RTC is unused，keep
VRTC pin open.
GPIO40
51
53
50
48
49
GPIO41
GPIO42
GPIO43
GPIO44
5GND
GND
2
10
14 GND
GND
40 GND
GND
37
43
SIM7100A
DC Output:1.75-3V
R102
R103
R104
R105
R106
R107
TVS
If USB interface is used，connect
USB_VBUS to DC 3V-5.25V
4.7uF
0R
C104 C105
Div Antenna
NCNC
VBAT 38
39
GND
65
VBAT
C110C109
Power supply
100uF
VBAT
100uF
VBAT
83
85
84
86
RF_CFG1
RF_CFG2
RF_CFG3
87
BOOT_CFG0
BOOT_CFG1 Test point
81 GND
Figure 39: Reference design
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B. SIM7100A GPIOs List
Table 50: SIM7100A GPIOs list
Name GPIO Index Default Function Alternate Function
PCM_IN 0 GPIO Interrupt [LEVEL/LOW] PCM_IN
STATUS_LED 1 Status led GPIO1
PCM_SYNC 2 GPIO [IN] PCM_SYNC
PCM_CLK 3 GPIO [OUT/LOW] PCM_CLK
RF_SWITCH 4 RF Switch GPIO4
PCM_OUT 5 GPIO [OUT/LOW] PCM_OUT
KBR4 6 Keypad GPIO
KBR3 7 Keypad GPIO
KBR2 8 Keypad GPIO
KBR1 9 Keypad GPIO
KBR0 10 Keypad GPIO
KBC4 11 Keypad GPIO
KBC3 12 Keypad GPIO
KBC2 13 Keypad GPIO
KBC1 14 Keypad GPIO
KBC0 15 Keypad GPIO
CTS 33 CTS GPIO
RTS 34 RTS GPIO
DTR 35 DTR wake up module GPIO
DCD 36 DCD GPIO
RI 37 RI wake up host GPIO
GPIO40 40 Module power up status GPIO
GPIO41 41 Wake up host GPIO
GPIO42 42 GPIO[OUT/LOW] GPIO
GPIO43 43 Wake up module GPIO
GPIO44 44 GPIO[OUT/LOW] GPIO
C. Digital I/O Characteristics
Table 51: Digital I/O characteristics
Parameter Description 1.8V Digital I/O Unit
Min Typ Max
VIH High-level input
voltage 1.26 1.8 2.1 V
VIL Low-level input
voltage -0.3 0 0.63 V
VOH High-level output 1.35 - 1.8 V
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voltage
VOL Low-level output
voltage 0 0 0.45 V
IOH High-level output
current - 1 - mA
IOL
Low-level output
current - -1 - mA
IIH Input high leakage
current - - 1 uA
IIL Input low leakage
current -1 - - uA
CIN Input capacitance - - 7 pF
Note: These parameters are for digital interface pins, such as keypad, GPIO, I2C, UART, SPI. Digital
I/O specifications under both conditions are presented in the above tables.
D. Related Documents
Table 52: Related documents
SN Document name Remark
[1] SIM7100A_ATC_V1.00 SIM7100A_ATC_V1.00
[2] ITU-T Draft new
recommendationV.25ter Serial asynchronous automatic dialing and control
[3] GSM 07.07 Digital cellular telecommunications (Phase 2+); AT command set
for GSM Mobile Equipment (ME)
[4] GSM 07.10 Support GSM 07.10 multiplexing protocol
[5] GSM 07.05
Digital cellular telecommunications (Phase 2+); Use of Data
Terminal Equipment – Data Circuit terminating Equipment (DTE –
DCE) interface for Short Message Service (SMS) and Cell
Broadcast Service (CBS)
[6] GSM 11.14
Digital cellular telecommunications system (Phase 2+);
Specification of the SIM Application Toolkit for the Subscriber
Identity Module – Mobile Equipment (SIM – ME) interface
[7] GSM 11.11
Digital cellular telecommunications system (Phase 2+);
Specification of the Subscriber Identity Module – Mobile
Equipment (SIM – ME) interface
[8] GSM 03.38 Digital cellular telecommunications system (Phase 2+); Alphabets
and language-specific information
[9] GSM 11.10
Digital cellular telecommunications system (Phase 2)； Mobile
Station (MS) conformance specification； Part 1: Conformance
specification
[10] 3GPP TS 51.010-1 Digital cellular telecommunications system (Release 5); Mobile
Station (MS) conformance specification
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[11] 3GPP TS 34.124 Electromagnetic Compatibility (EMC) for mobile terminals and
ancillary equipment.
[12] 3GPP TS 34.121 Electromagnetic Compatibility (EMC) for mobile terminals and
ancillary equipment.
[13] 3GPP TS 34.123-1
Technical Specification Group Radio Access Network; Terminal
conformance specification; Radio transmission and reception
(FDD)
[14] 3GPP TS 34.123-3 User Equipment (UE) conformance specification; Part 3: Abstract
Test Suites.
[15] EN 301 908-02 V2.2.1
Electromagnetic compatibility and Radio spectrum Matters
(ERM); Base Stations (BS) and User Equipment (UE) for
IMT-2000. Third Generation cellular networks; Part 2:
Harmonized EN for IMT-2000, CDMA Direct Spread
(UTRA FDD) (UE) covering essential requirements of article
3.2 of the R&TTE Directive
[16] EN 301 489-24 V1.2.1
Electromagnetic compatibility and Radio Spectrum Matters (ERM);
Electromagnetic Compatibility (EMC) standard for radio
equipment and services; Part 24: Specific conditions for IMT-2000
CDMA Direct Spread (UTRA) for Mobile and portable (UE) radio
and ancillary equipment
[17] IEC/EN60950-1(2001) Safety of information technology equipment (2000)
[18] 3GPP TS 51.010-1 Digital cellular telecommunications system (Release 5); Mobile
Station (MS) conformance specification
[19] GCF-CC V3.23.1 Global Certification Forum - Certification Criteria
[20] 2002/95/EC
Directive of the European Parliament and of the Council of 27
January 2003 on the restriction of the use of certain hazardous
substances in electrical and electronic equipment (RoHS)
[21] Audio Application Note
V1.01 Audio Application Note V1.01
[22] Reserved Reserved
[23] Keypad Application
Note V1.01 Keypad Application Note V1.01
[24] Sleep_Application_Note Sleep_Application_Note
[25] Waking_up_Applicatio
n_Note
Waking_up_Application_Note
[26] Module
secondary-SMT-UGD
SMT Note
[27] SIM5xxx_Automatic_PO
WER_ON_Application_No
te
SIM5xxx_Automatic_POWER_ON_Application_Note
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E. Terms and Abbreviations
Table 53: Terms and Abbreviations
Abbreviation Description
ADC Analog-to-Digital Converter
ARP Antenna Reference Point
BER Bit Error Rate
BTS Base Transceiver Station
CS Coding Scheme
CSD Circuit Switched Data
CTS Clear to Send
DAC Digital-to-Analog Converter
DRX Discontinuous Reception
DSP Digital Signal Processor
DTE Data Terminal Equipment (typically computer, terminal, printer)
DTR Data Terminal Ready
DTX Discontinuous Transmission
EFR Enhanced Full Rate
EGSM Enhanced GSM
EMC Electromagnetic Compatibility
ESD Electrostatic Discharge
ETS European Telecommunication Standard
FCC Federal Communications Commission (U.S.)
FD SIM fix dialing phonebook
FDMA Frequency Division Multiple Access
FR Full Rate
GMSK Gaussian Minimum Shift Keying
GPRS General Packet Radio Service
GSM Global Standard for Mobile Communications
HR Half Rate
I2C Inter-Integrated Circuit
IMEI International Mobile Equipment Identity
Inorm Normal Current
Imax Maximum Load Current
kbps Kilo bits per second
Li-Ion Lithium-Ion
MO Mobile Originated
MS Mobile Station (GSM engine), also referred to as TE
MT Mobile Terminated
PAP Password Authentication Protocol
PBCCH Packet Switched Broadcast Control Channel
PCB Printed Circuit Board
PCS Personal Communication System, also referred to as GSM 1900
RF Radio Frequency
RMS Root Mean Square (value)
RTC Real Time Clock
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Rx Receive Direction
SIM Subscriber Identification Module
SMS Short Message Service
SPI serial peripheral interface
TDMA Time Division Multiple Access
TE Terminal Equipment, also referred to as DTE
TX Transmit Direction
UART Universal Asynchronous Receiver & Transmitter
VSWR Voltage Standing Wave Ratio
Vmax Maximum Voltage Value
Vnorm Normal Voltage Value
Vmin Minimum Voltage Value
VIHmax Maximum Input High Level Voltage Value
VIHmin Minimum Input High Level Voltage Value
VILmax Maximum Input Low Level Voltage Value
VILmin Minimum Input Low Level Voltage Value
VImax Absolute Maximum Input Voltage Value
VImin Absolute Minimum Input Voltage Value
VOHmax Maximum Output High Level Voltage Value
VOHmin Minimum Output High Level Voltage Value
VOLmax Maximum Output Low Level Voltage Value
VOLmin Minimum Output Low Level Voltage Value
SM SIM phonebook
NC Not connect
EDGE Enhanced data rates for GSM evolution
HSDPA High Speed Downlink Packet Access
HSUPA High Speed Uplink Packet Access
ZIF Zero intermediate frequency
WCDMA Wideband Code Division Multiple Access
VCTCXO Voltage control temperature-compensated crystal oscillator
USIM Universal subscriber identity module
UMTS Universal mobile telecommunications system
UART Universal asynchronous receiver transmitter
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F. Safety Caution
Table 54: Safety caution
Marks Requirements
When in a hospital or other health care facility, observe the restrictions about the use
of mobiles. Switch the cellular terminal or mobile off, medical equipment may be
sensitive to not operate normally for RF energy interference.
Switch off the cellular terminal or mobile before boarding an aircraft. Make sure it is
switched off. The operation of wireless appliances in an aircraft is forbidden to
prevent interference with communication systems. Forget to think much of these
instructions may lead to the flight safety or offend against local legal action, or both.
Do not operate the cellular terminal or mobile in the presence of flammable gases or
fumes. Switch off the cellular terminal when you are near petrol stations, fuel depots,
chemical plants or where blasting operations are in progress. Operation of any
electrical equipment in potentially explosive atmospheres can constitute a safety
hazard.
Your cellular terminal or mobile receives and transmits radio frequency energy while
switched on. RF interference can occur if it is used close to TV sets, radios,
computers or other electric equipment.
Road safety comes first! Do not use a hand-held cellular terminal or mobile when
driving a vehicle, unless it is securely mounted in a holder for hands free operation.
Before making a call with a hand-held terminal or mobile, park the vehicle.
GSM cellular terminals or mobiles operate over radio frequency signals and cellular
networks and cannot be guaranteed to connect in all conditions, for example no
mobile fee or a invalid SIM card. While you are in this condition and need emergent
help, please remember using emergency calls. In order to make or receive calls, the
cellular terminal or mobile must be switched on and in a service area with adequate
cellular signal strength.
Some networks do not allow for emergency call if certain network services or phone
features are in use (e.g. lock functions, fixed dialing etc.). You may have to
deactivate those features before you can make an emergency call.
Also, some networks require that a valid SIM card be properly inserted in the cellular
terminal or mobile.
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Contact us:
Shanghai SIMCom Wireless Solutions Ltd.
Add: SIM Technology Building, No.633, Jinzhong Road, Changning District, Shanghai P.R. China
200335
Tel: +86 21 3235 3300
Fax: +86 21 3235 3301
URL: www.sim.com/wm