Simcom 2011091310088 GSM/GPRS/GPS Module User Manual SIM908 Rev 3

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Document ID	1557862
Application ID	rzxpGqlXV8JuJPMBlDcl1Q==
Document Description	Users Manual
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Document Type	User Manual
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Date Submitted	2011-10-10 00:00:00
Date Available	2011-10-10 00:00:00
Creation Date	2011-10-08 13:13:35
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Document Lastmod	2011-10-08 13:13:35
Document Title	Microsoft Word - SIM908_User Manual_Rev 3.doc
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Document Author:	spring

SIM908 Document
SIM908 User Manual
Note: This device complies with part 15 Rules. Operation is subject to the following two conditions: (1) This
device may not cause harmful interference, and (2) this device must accept any interference received, including
interference that may cause undesired operation.
If this equipment is installed in a host, We can find the ID label when opening the host. For label requirement
when transmitter module is installed in a host, the host shall have an additional permanent label referring to the
enclosed module:“Contains Transmitter Module FCC ID: UDV-2011091310088” or “Contains FCC ID:
UDV-2011091310088”.
This equipment has a GSM antenna and a GPS antenna, the GPS antenna peak gain is 5 dBi and modulation
type is BPSK; the GSM antenna peak gain is 3 dBi and modulation type is GMSK.
WARNING: Changes or modifications to this unit not expressly approved by the party responsible for
compliance could void the user's authority to operate the equipment. The antenna of the product, under normal
use condition is at least 24.22 cm away from the body of the user,the user must keeping at least 24.22cm
distance to the antenna.
The device has been evaluated to meet general RF exposure requirement. The device can be used in portable
exposure condition without restriction.
1. SIM908 Description
1.1 Summarize
Designed for global market, SIM908 is integrated with a high performance GSM/GPRS engine and a GPS engine.
The GSM/GPRS engine is a quad-band GSM/GPRS module that works on frequencies GSM 850MHz, EGSM
900MHz, DCS 1800MHz and PCS 1900MHz. SIM908 features GPRS multi-slot class 10/ class 8 (optional) and
supports the GPRS coding schemes CS-1, CS-2, CS-3 and CS-4. The GPS solution offers best- in-class
acquisition and tracing sensitivity, Time-To-First-Fix (TTFF) and accuracy.
With a tiny configuration of 30*30*3.2mm, SIM908 can meet almost all the space requirements in user
applications, such as M2M, smart phone, PDA, tracker and other mobile devices.
SIM908 has 80 SMT pads, and provides all hardware interfaces between the module and customers’ boards.
z Serial port and debug port can help user easily develop user’s applications.
z GPS Serial port.
z Two audio channels include two audio inputs and two audio outputs. These can be easily configured by AT
command.
z Charging interface.
z Programmable general purpose input and output.
z The keypad and SPI display interfaces will give users the flexibility to develop customized applications.
z RF pad and connector interface.
SIM908 is designed with power saving technique so that the current consumption is as low as 1.0mA in sleep
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mode (GPS engine is powered down).
SIM908 integrates TCP/IP protocol and extended TCP/IP AT commands which are very useful for data transfer
applications.
1.2 SIM908 Key Features
Table 1: SIM908 GSM/GPRS engine key features
Feature
Implementation
Power supply
3.4V ~ 4.5V
Power saving
Typical power consumption in sleep mode is 1.0mA ( BS-PA-MFRMS=9, GPS
engine is powered down )
Charging
Supports charging control for Li-Ion battery
SIM908 Quad-band: GSM 850, EGSM 900, DCS 1800, PCS 1900. SIM908
can search the 4 frequency bands automatically. The frequency bands also
can be set by AT command “AT+CBAND”. For details, please refer to
document [1].
Compliant to GSM Phase 2/2+
Transmitting power
Class 4 (2W) at GSM 850 and EGSM 900
Class 1 (1W) at DCS 1800 and PCS 1900
GPRS connectivity
GPRS multi-slot class 10（default）
GPRS multi-slot class 8 (option)
Temperature range
Normal operation: -20°C ~ +60°C
Restricted operation: -40°C ~ -20°C and +80 °C ~ +60°C*
Storage temperature -45°C ~ +90°C
Data GPRS
GPRS data downlink transfer: max. 85.6 kbps
GPRS data uplink transfer: max. 42.8 kbps
Coding scheme: CS-1, CS-2, CS-3 and CS-4
Integrate the TCP/IP protocol.
Support Packet Broadcast Control Channel (PBCCH)
CSD
Support CSD transmission
USSD
Unstructured Supplementary Services Data (USSD) support
SMS
MT, MO, CB, Text and PDU mode
SMS storage: SIM card
FAX
Group 3 Class 1
SIM interface
Support SIM card: 1.8V, 3V
External antenna
Antenna pad
Audio features
Speech codec modes:
z Half Rate (ETS 06.20)
z Full Rate (ETS 06.10)
z Enhanced Full Rate (ETS 06.50 / 06.60 / 06.80)
z Adaptive multi rate (AMR)
Frequency bands
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Serial port and
debug port
Echo Cancellation
Noise Suppression
Serial port:
Full modem interface with status and control lines, unbalanced,
asynchronous.
1200bps to 115200bps.
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 57600bps.
Debug port:
Null modem interface GPS/DBG_TXD and GPS/DBG_RXD.
Can be used for debugging and upgrading firmware.
Phonebook management
Support phonebook types: SM, FD, LD, RC, ON, MC.
SIM application toolkit
GSM 11.14 Release 99
Real time clock
Support RTC
Physical characteristics
Size: 30*30*3.2mm
Weight: 5.2g
Firmware upgrade
Firmware upgradeable by debug port.
SIM908 does work at this temperature, but some radio frequency characteristics may deviate from the GSM
specification.
Table 2: GPS engine Performance
Performance
Parameter
Description
Min
Horizontal Position
Accuracy(a)
Velocity Accuracy(b)
Time To First Fix(c)
Sensitivity
Receiver
Typ
Autonomous
Max
2.5
Unit
Speed
0.01
m/s
Heading
0.01
°
Hot start
Cold start
30
Autonomous
acquisition
-143
dBm
Tracking
-160
dBm
Channels
42
Update rate
Altitude
Hz
18288
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Velocity
1850
Tracking
CA Code
km/h
L1,
Protocol support
NMEA,OSP
Power consumption(d)
Continuous
tracking
76
acquisition
77
Power
current
down
mA
0.03
uA
Table 3: Coding schemes and maximum net data rates over air interface
Coding scheme
1 timeslot
2 timeslot
4 timeslot
CS-1
9.05kbps
18.1kbps
36.2kbps
CS-2
13.4kbps
26.8kbps
53.6kbps
CS-3
15.6kbps
31.2kbps
62.4kbps
CS-4
21.4kbps
42.8kbps
85.6kbps
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2. Package Information
GND
GPS-ANT
GND
GND
GPS-VANT-IN
GPS-VANT-OUT
VCHG
TEMP-BAT
DTR
TXD
DCD
RI
RXD
CTS
RTS
GND
GND
VBAT
VBAT
GND
79
78
77
76
75
74
73
72
71
70
69
68
67
66
65
64
63
62
61
60
59
GND
GND
PWRKEY
58
GND
NC
57
GND
GND
56
I2C-SDA
DISP-CLK
55
I2C-SCL
DISP-DATA
54
NC
DISP-D/C
53
NC
DISP-CS
52
STATUS
GND
10
51
NETLIGHT
NC
11
50
PWM3
NC
12
49
PWM2
NC
13
48
PWM1
GND
GPS/DBG-TXD
GPS/DBG-RXD
14
47
ADC
15
16
46
45
NC
NC
SIM-DATA
17
44
VDD-EXD
SIM-RST
18
43
GND
SIM-CLK
19
42
VRTC
SIM-VDD
20
41
GND
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
SPK1P
MIC1P
MIC1N
SPK2N
SPK2P
MIC2P
MIC2N
NC
NC
GPIO1/KBR0
GPIO2/KBR1
GPI O3/KBR2
GPIO4/KBC0
GPIO5/KBC1
GPIO6/KBC2
GND
NC
NC
GND
SIM908
TOP VIEW
SPK1N
GND
80
2.1 Pin out Diagram
GSM-ANT
Figure 1: SIM908 pin out diagram (Top view)
2.2 Pin Description
Table 4: Pin description
Pin name
Pin number
I/O
Description
Comment
62, 63
Power supply
3.2V ~ 4.8V
Power supply for RTC
It is recommended to
connect with a battery or
a capacitor (e.g. 4.7uF).
Power supply
VBAT
VRTC
42
I/O
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VDD-EXT
44
2.8V output power supply
If it is unused, keep open.
GPS-VANT-OUT
75
2.8V output for GPS active antenna
If it is unused, keep open.
GPS-VANT-IN
76
GPS active antenna power supply
If it is unused, keep open.
GND
1, 2, 5, 10, 14, 37,
40, 41, 43, 57, 58,
60, 61, 64, 65, 77,
78, 80
Ground
Charge interface
VCHG
74
Charger input
TEMP_BAT
73
Battery temperature sensor
PWRKEY should be pulled low at
least 1 second and then released to
power on/down the module.
Differential audio input
Differential audio output
Differential audio input
Differential audio output
Power on/down
PWRKEY
Pulled up internally.
Audio interfaces
MIC1P
23
MIC1N
24
SPK1P
22
SPK1N
21
MIC2P
27
MIC2N
28
SPK2N
25
SPK2P
26
If these pins are unused,
keep open.
Status
STATUS
52
Power on status
NETLIGHT
51
Network status
DISP -CLK
DISP-DATA
I/O
DISP -D/C
DISP -CS
56
If these pins are unused,
keep open.
LCD interface
Display interface
If these pins are unused,
keep open.
I C interface
I2C-SDA
I2C-SCL
55
I2C serial bus data
I/O
I C serial bus clock
I/O
GPIO1/keypad row 0
If these pins are unused,
keep open.
Keypad interface / GPIOs
GPIO1/KBR0
31
GPIO2/KBR1
32
GPIO2/keypad row 1
GPIO3/KBR2
33
GPIO3/keypad row 2
-6-
If these pins are unused,
keep open.
SIM908
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GPIO4/KBC0
34
GPIO4/keypad column 0
GPIO5/KBC1
35
GPIO5/keypad column 1
GPIO6/KBC2
36
GPIO6/keypad column 3
Serial port
RXD
68
Receive data
TXD
71
Transmit data
RTS
66
Request to send
CTS
67
Clear to send
DCD
70
Data carrier detect
RI
69
Ring indicator
DTR
72
Data terminal ready
For GPS NMEA information output ,
debugging and upgrading firmware
If only TXD and RXD
are used, it is suggested
to pull down DTR, and
others pins can be kept
open.
GPS/Debug interface
GPS/DBG-TXD
15
GPS/DBG-RXD
16
SIM-VDD
20
Voltage supply for SIM card. Support
1.8V or 3V SIM card
SIM-DATA
17
I/O
SIM data input/output
SIM-CLK
19
SIM clock
SIM-RST
18
SIM reset
47
Input voltage range: 0V ~ 2.8V
If these pins are unused,
keep open.
SIM interface
All signals of SIM
interface
should
be
protected against ESD
with a TVS diode array.
ADC
ADC
If it is unused, keep open.
Pulse width modulation( PWM )
PWM1
48
PWM
PWM2
49
PWM
PWM3
50
PWM
If these pins are unused,
keep open.
GSM/GPS RF interface
GSM-ANT
59
I/O
GSM radio antenna connection
Impendence must
controlled to 50Ω.
be
GPS-ANT
79
GPS radio antenna connection
Impendence must
controlled to 50Ω.
be
4,11,12,13,29,30,
38,39,45,46,53,54
Not connect
NC
These pins should be
kept open.
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2.3 Package Dimensions
Figure 2: Dimensions of SIM908（Unit: mm）
Figure 3: Recommended PCB footprint outline（Unit: mm）
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SIM908
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2.4 Pictures
GSM
Antenna connector
GPS PAD
GPS
Antenna connector
GSM PAD
Figure 4: The RF interface of module
3. Detail Block Diagram
Figure 5: Block diagram of SIM908
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SIM908
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4. Electrical and Reliability Characteristics
4.1 Absolute Maximum Ratings
The absolute maximum ratings stated in following table are stress ratings under non-operating conditions. Stresses
beyond any of these limits will cause permanent damage to SIM908.
Table 5: Absolute maximum ratings
Symbol
Parameter
Min
Typ
Max
Unit
VBAT
Power supply voltage
5.5
Input voltage
-0.3
3.1
II*
Input current
10
mA
IO*
Output current
10
mA
VI
These parameters are for digital interface pins, such as keypad, GPIO, I2C, UART, LCD, PWMs and DEBUG.
4.2 Recommended Operating Conditions
Table 6: Recommended operating conditions
Symbol
Parameter
Min
Typ
Max
Unit
VBAT
Power supply voltage
3.2
4.0
4.8
TOPER
Operating temperature
-40
+25
+85
℃
TSTG
Storage temperature
-45
+90
℃
4.3 Digital Interface Characteristics
Table 7: Digital interface characteristics
Symbol
Parameter
Min
Typ
Max
Unit
IIH
High-level input current
-10
10
uA
IIL
Low-level input current
-10
10
uA
VIH
High-level input voltage
2.4
VIL
Low-level input voltage
0.4
VOH
High-level output voltage
2.7
VOL
Low-level output voltage
0.1
* These parameters are for digital interface pins, such as keypad, GPIO, I C, UART, LCD, PWMs and DEBUG.
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4.4 SIM Card Interface Characteristics
Table 8: SIM card interface characteristics
Symbol
Parameter
Min
Typ
Max
Unit
IIH
High-level input current
-10
10
uA
IIL
Low-level input current
-10
10
uA
VIH
High-level input voltage
1.4
2.4
VIL
Low-level input voltage
0.4
2.4
VOH
High-level output voltage
VOL
Low-level output voltage
1.7
2.7
0.1
0.1
4.5 VDD_EXT Characteristics
Table 9: VDD_EXT characteristics
Symbol
Parameter
Min
Typ
Max
Unit
VO
Output voltage
2.70
2.80
2.95
IO
Output current
10
mA
Min
Typ
Max
Unit
2.75
2.9
3.00
1.65
1.80
1.95
10
mA
4.6 SIM_VDD Characteristics
Table 10: SIM_VDD characteristics
Symbol
Parameter
VO
Output voltage
IO
Output current
4.7 VRTC Characteristics
Table 11: VRTC characteristics
Symbol
Parameter
Min
Typ
Max
Unit
VRTC-IN
VRTC input voltage
2.00
3.00
3.15
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IRTC-IN
VRTC input current
uA
VRTC-OUT
VRTC output voltage
3.00
IRTC-OUT
VRTC output current
10
uA
4.8 Current Consumption (VBAT = 3.8V, GPS engine is powered down)
Table 12: GSM current consumption
Symbol
Parameter
Conditions
Value
Unit
IVRTC
VRTC current
VBAT disconnects. Backup battery is 3 V
uA
IVBAT
VBAT current
Power down mode
50
uA
Sleep mode
BS-PA-MFRMS=9
1.2
BS-PA-MFRMS=5
1.5
BS-PA-MFRMS=2
1.7
mA
GSM 850
Idle mode
EGSM 900
21
DCS 1800
mA
PCS 1900
GSM 850
EGSM 900
Voice call
DCS 1800
PCS 1900
Data mode
GPRS(1Rx,1Tx)
Data mode
GPRS(4Rx,1Tx)
Data mode
GPRS(3Rx,2Tx)
GSM 850
EGSM 900
DCS 1800
PCS 1900
GSM 850
EGSM 900
DCS 1800
PCS 1900
GSM 850
EGSM 900
- 12 -
PCL=5
240
PCL=12
110
PCL=19
76
PCL=0
180
PCL=7
89
PCL=15
76
PCL=5
240
PCL=12
110
PCL=19
83
PCL=0
170
PCL=7
95
PCL=15
80
PCL=5
270
PCL=12
150
PCL=19
120
PCL=0
210
PCL=7
130
PCL=15
115
PCL=5
435
PCL=12
185
PCL=19
130
mA
mA
mA
mA
mA
mA
SIM908
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DCS 1800
PCS 1900
IVBAT-peak
Peak current
During Tx burst
PCL=0
320
PCL=7
155
PCL=15
122
mA
4.9 Electro-Static Discharge
SIM908 is an ESD sensitive component, so more attention should be paid to the procedure of handling and
packaging. The ESD test results are shown in the following table.
Table 13: The ESD characteristics (Temperature: 25℃, Humidity: 45 %)
Pin
Contact discharge
Air discharge
VBAT
±5KV
±10KV
GND
±4KV
±10KV
RXD, TXD
±3KV
±6KV
Antenna port
±5KV
±10KV
SPKP/ SPKN
MICP/ MICN
±3KV
±8KV
PWRKEY
±3KV
±8KV
4.10 Radio Characteristics
4.10.1 Module RF Output Power
The following table shows the module conducted output power, it is followed by the 3GPP TS 05.05 technical
specification requirement.
Table 14: SIM908 GSM 900 and GSM 850 conducted RF output power
GSM 900 and EGSM 850
PCL
Tolerance (dB) for conditions
Nominal output power (dBm)
Normal
Extreme
0-2
39
±2
±2.5
37
±3
±4
35
±3
±4
33
±3
±4
31
±3
±4
29
±3
±4
27
±3
±4
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25
±3
±4
10
23
±3
±4
11
21
±3
±4
12
19
±3
±4
13
17
±3
±4
14
15
±3
±4
15
13
±3
±4
16
11
±5
±6
17
±5
±6
18
±5
±6
19-31
±5
±6
Table 15: SIM908 DCS 1800 and PCS 1900 conducted RF output power
DCS 1800 and PCS 1900
PCL
Tolerance (dB) for conditions
Nominal output power (dBm)
Normal
Extreme
29
36
±2
±2.5
30
34
±3
±4
31
32
±3
±4
30
±3
±4
28
±3
±4
26
±3
±4
24
±3
±4
22
±3
±4
20
±3
±4
18
±3
±4
16
±3
±4
14
±3
±4
12
±4
±5
10
10
±4
±5
11
±4
±5
12
±4
±5
13
±4
±5
14
±5
±6
15-28
±5
±6
For the module’s output power, the following is should be noted:
At GSM900 and GSM850 band, the module is a class 4 device, so the module’s output power should not exceed
33dBm, and at the maximum power level, the output power tolerance should not exceed +/-2dB under normal
condition and +/-2.5dB under extreme condition.
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SIM908
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At DCS1800 and PCS1900 band, the module is a class 1 device, so the module’s output power should not exceed
30dBm, and at the maximum power level, the output power tolerance should not exceed +/-2dB under normal
condition and +/-2.5dB under extreme condition.
4.10.2 Module RF Receive Sensitivity
The following table shows the module’s conducted receive sensitivity, it is tested under static condition.
Table 16: SIM908 conducted RF receive sensitivity
Frequency
Receive sensitivity（Typical）
Receive sensitivity(Max)
GSM850
-109dBm
-107dBm
EGSM900
-109dBm
-107dBm
DCS1800
-109dBm
-107dBm
PCS1900
-109dBm
-107dBm
4.10.3 Module Operating Frequencies
The following table shows the module’s operating frequency range; it is followed by the 3GPP TS 05.05 technical
specification requirement.
Table 17: SIM908 operating frequencies
Frequency
Receive
Transmit
GSM850
869 ~ 894MHz
824 ~ 849 MHz
EGSM900
925 ~ 960MHz
880 ~ 915MHz
DCS1800
1805 ~ 1880MHz
1710 ~ 1785MHz
PCS1900
1930 ~ 1990MHz
1850 ~ 1910MHz
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