MobileTek Communication L600 LTE-CATM1 IOT User Manual 2AK9DL600

Shanghai MobileTek Communication Ltd. LTE-CATM1 IOT 2AK9DL600

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L600 Hardware Design
L600 Hardware Design
LTE Module Series
Version： V1.0
Date： 2017-06-06
Copyright © Shanghai Mobiletek Communication Ltd
Shanghai Mobiletek Communication
Ltd
L600 Hardware Design
Notice
Some features of the product and its accessories described herein rely on the software installed,
capacities and settings of local network, and therefore may not be activated or may be limited by local
network operators or network service providers.
Thus, the descriptions herein may not exactly match the product or its accessories which you purchase.
Shanghai Mobiletek Communication Ltd reserves the right to change or modify any information or
specifications contained in this manual without prior notice and without any liability.
Copyright
This document contains proprietary technical information which is the property of Shanghai Mobiletek
Communication Ltd. 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 patent or the registration of a utility model or
design. All specification supplied herein are subject to change without notice at any time.
DISCLAIMER
ALL CONTENTS OF THIS MANUAL ARE PROVIDED “AS IS”. EXCEPT AS REQUIRED BY
APPLICABLE LAWS, NO WARRANTIES OF ANY KIND, EITHER EXPRESS OR IMPLIED,
INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
AND FITNESS FOR A PARTICULAR PURPOSE, ARE MADE IN RELATION TO THE
ACCURACY, RELIABILITY OR CONTENTS OF THIS MANUAL.
TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, IN NO EVENT SHALL
SHANGHAI MOBILETEK COMMUNICATION LTD BE LIABLE FOR ANY SPECIAL,
INCIDENTAL, INDIRECT, OR CONSEQUENTIAL DAMAGES, OR LOSS OF PROFITS,
BUSINESS, REVENUE, DATA, GOODWILL SAVINGS OR ANTICIPATED SAVINGS
REGARDLESS OF WHETHER SUCH LOSSES ARE FORSEEABLE OR NOT.
Copyright © Shanghai Mobiletek Communication Ltd
L600 Hardware Design
Version History
Date
Version Description of change
2017-06-14
V1.0
Author
Initial
Copyright © Shanghai Mobiletek Communication Ltd
L600 Hardware Design
Contents
1 ABOUT THIS DOCUMENT ...................................... 7
1.1Applicable scope ....................................................................................................................................... 7
1.2 Writing purpose ....................................................................................................................................... 7
1.3 Support and reference documents list .................................................................................................... 7
1.4 Terms and Abbreviations ........................................................................................................................ 8
2 PRODUCT OVERVIEW ......................................... 9
2.1 Package Dimensions .............................................................................................................................. 10
2.2 Product Function Outline ..................................................................................................................... 11
2.2.1 Hardware Diagram ....................................................... 11
2.2.2 Radio frequency function ............................................... 12
3 INTERFACE DESCRIPTION ................................... 14
3.1 PIN Definition ...................................................................................................................................... 14
3.1.1 Pin I/O parameter definition ........................................... 14
3.1.2 Pin Map ................................................................ 14
3.1.3 PIN Definition and function description ................................ 15
3.2 Operating condition ............................................................................................................................. 20
3.3 Digital I/O characteristics ..................................................................................................................... 20
3.4 Power Interface ...................................................................................................................................... 20
3.4.1 Power supply pin description ........................................... 20
3.4.2 Power supply requirements .............................................. 21
3.4.3 Power Supply Design Guide .............................................. 22
3.4.4 Recommended Power supply circuit ....................................... 23
3.4.5 Power Supply Layout guide .............................................. 24
3.5 UIM interface ......................................................................................................................................... 24
3.5.1 Pin definition ......................................................... 24
3.5.2 Design Guide ........................................................... 25
3.5.3 UIM interface reference circuit ........................................ 25
3.6 PCM interface ........................................................................................................................................ 25
3.6.1 PCM interface definition ............................................... 25
3.6.2 PCM interface application .............................................. 27
3.7 USB2.0 interface .................................................................................................................................... 28
3.7.1 USB interface pin definition ........................................... 28
3.7.2 USB Interface application .............................................. 28
3.8 UART Interface...................................................................................................................................... 29
3.8.1 Pin description ........................................................ 29
Copyright © Shanghai Mobiletek Communication Ltd
L600 Hardware Design
3.8.2 UART interface application ............................................. 30
3.9 Power on/off and reset interface ........................................................................................................... 32
3.9.1 Pin definition ......................................................... 32
3.9.2 Power on sequence ...................................................... 33
3.9.3 Power off sequence ..................................................... 33
3.9.4 Reset sequence ......................................................... 35
3.9.5 Power on/off and reset interface application ........................... 35
3.10 Interactive interface............................................................................................................................. 36
3.10.1 Pin definition ........................................................ 36
3.10.2 interactive interface application ..................................... 37
3.11 Net Light interface ............................................................................................................................... 38
3.11.1 Pin define ............................................................ 38
3.11.2 Net light application ................................................. 38
3.12 System boot configuration and download.......................................................................................... 39
3.12.1 Pin definition ........................................................ 39
3.12.2 Boot configuration and force USB interface application ................ 39
3.13 Analog and Digital conversion (ADC) interface ................................................................................ 40
3.14 I2C interface......................................................................................................................................... 40
3.14.1 I2C pin definition .................................................... 40
3.15 Antenna interface ................................................................................................................................. 41
3.15.1 RF signal PCB layout guide ............................................ 41
3.15.2 applications .......................................................... 41
4 PRODUCT CHARACTERISTICS ................................. 43
4.1 Absolute parameters .............................................................................................................................. 43
4.2 Operation condition ............................................................................................................................... 43
4.2.1 Operation voltage ...................................................... 43
4.2.2 Work mode(TBD) ......................................................... 44
4.2.3 current consumption(TBD) ............................................... 45
4.3 Working and storage temperature ....................................................................................................... 45
4.4 ESD performance .................................................................................................................................. 46
5 DESIGN GUIDELINE ........................................ 46
5.1 General design rules and requirements ............................................................................................... 46
5.2 Reference circuit .................................................................................................................................... 47
5.3 RF part design guideline ....................................................................................................................... 47
5.3.1 Early antenna design considerations................................................................................................. 47
5.4 EMC and ESD design advice ................................................................................................................ 48
5.5 PCB Recommended land pattern ......................................................................................................... 48
5.6 Products recommended upgrade .......................................................................................................... 49
6 MANUFACTURERS ........................................... 50
Copyright © Shanghai Mobiletek Communication Ltd
L600 Hardware Design
6.1 Steel mesh design ................................................................................................................................... 50
6.2 Temperature curve................................................................................................................................. 51
7 PACKAGE STORAGE INFORMATION ............................. 53
7.1 Package information.............................................................................................................................. 53
7.1.1 Tape and reel information .............................................. 53
7.1.1 Package information .................................................... 53
7.2 Bagged storage conditions ..................................................................................................................... 54
Copyright © Shanghai Mobiletek Communication Ltd
L600 Hardware Design
1 About this document
1.1Applicable scope
This document describes the L600 series 4G LTE CAT-M1 and NB1 LCC Module (hereinafter
referred to as L600), the basic specifications, product electrical characteristics, design guidance and
hardware interface development guidance. Users need to follow this documentation requirements and
guidance for design.
This document applies only to L600 products in the application development.
1.2 Writing purpose
This document provides the design and development basis for the product users. By reading this
document, users can have a whole understanding of the product, the technical parameters of the
product have a clear understanding, and can be used in this document to complete the development of
wireless 4G Internet access functions.
This hardware development document not only provides the product functional features and
technical parameters, but also provides product reliability testing and related testing standards,
business functions to achieve process, RF performance indicators and user circuit design guidance.
1.3 Support and reference documents list
In addition to the hardware development documentation, we also provide a guide to the
development board based on this product manual and software development instruction manual, 1-1 is
supported as a list.
Table 1-1 support document list
No.
Documents
《L600 AT Command User Guide》
《L600_SPEC.docx》
《L600 EVB User Manual》
《L600 Schematic checklist》
《L600 Layout checklist》
《L600_Reference Design_V1.pdf》
《L600_V1_DECAL.sch》
Copyright © Shanghai Mobiletek Communication Ltd
L600 Hardware Design
《L600_V1_DECAL.PCB》
1.4 Terms and Abbreviations
Table 1-2 is the Document relative Terms and Abbreviations。
Table 1-2
Terms and Abbreviations
Abbreviation
Descriptions
ESD
Electro-Static discharge
USB
Universal Serial Bus
UART
Universal Asynchronous Receiver Transmitter
SDCC
Secure Digital Card Controller
USIM
Universal Subscriber Identification Module
SPI
Serial Peripheral Interface
I2C
Inter-Integrated Circuit
PCM
Pulse-coded Modulation
I/O
Input/output
LED
Light Emitting Diode
GPIO
General-purpose Input/Output
GSM
Global Standard for Mobile Communications
GPRS
General Packet Radio Service
WCDMA
Wideband Code Division Multi Access
UMTS
Universal Mobile Telecommunication System
HSDPA
High Speed Downlink Packet Access
HSUPA
High Speed Uplink Packet Access
AGPS
Assisted Global Positioning System
BER
Bit Error Rate
DL
Downlink
COEX
WLAM/LTE-ISM coexistence
SMPS
Switched-mode power supplies
LTE
Long Term Evolution
FDD
Frequency Division Duplexing
TDD
Time Division Duplexing
Copyright © Shanghai Mobiletek Communication Ltd
L600 Hardware Design
DPCH
Dedicated Physical Channel
DPCH_Ec
Average energy per PN chip for DPCH. DPCH
2 Product Overview
L600 is a series of LTE CAT M1 and CAT NB1 module and special design for global IOT
market, and it’s have integrated rich peripheral interface. User can choose the module based on the
wireless network configuration. In this document, the supported radio band is described in the
following items. This product is a LCC interface of 4G wireless internet module, with the high speed,
small size, light weight, high reliability can be widely used in various products and devices with
wireless internet access:
Table 2-1 L600 series module type correspond band
Support band
LTE CAT M1
Full Duplex FDD
L600
FDD_LTE B1
●
FDD_LTE B3
●
Data transmission specifications

LTE-FDD
- Uplink up to 375k bps,
- Downlink up to 375K bps
Interface

USB2.0

UART

UIM (3V/1.8V)

GPIO

ADC*2

PCM

SPI

I2C

NETLIGHT

POWER KEY

RESET
Dimensions（L×W×H）:25mm×21.5mm×2.6mm
Copyright © Shanghai Mobiletek Communication Ltd
L600 Hardware Design
TOP VIEW
Figure 2-1
BOTTOM VIEW
Product Physical Map
SIDE VIEW
2.1 Package Dimensions
The product module is 64-PIN LCC package module. The size of L600 is extremely
small, it is only 21.5.0 x 25.0 x 2.6 mm with LCC package, It is cost
competitive and high integrated which make it convenient for customer to
design their own application products. Pin 1 position from the bottom of the
belt angle welding plate to identify, the missing corner where the direction
of the corresponding module angle pad, figure 2-2 is the product dimension
type map:
Copyright © Shanghai Mobiletek Communication Ltd
10
L600 Hardware Design
(a)Top Dimensions (Unit mm)
(b)Side View (Unit mm)A
(c)Bottom Dimensions (Unit mm)
Note: BGA test pin in actual use of the customers don't need (PCB assembly, the stencil file).
Figure 2-2
Module Dimensions
2.2 Product Function Outline
2.2.1 Hardware Diagram
This product mainly includes the following signal group：USB Interface signal、USIM card Interface
signal、I2C Interface signal、UART Interface signal、PCM Interface signal、SPI interface、Module
startup、Module control signal、Power supply and ground. The global architecture of the L600 module
is described in the figure below.
Copyright © Shanghai Mobiletek Communication Ltd
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L600 Hardware Design
MAIN ANT
FLASH
DDR
ASM
UART/SPI
SIM CARD
GNSS IQ
RF
Transceiver
Baseband
RF IQ
CLK
PCM
DATA
LTE CAT M1 / Nbe PA
I/O STATUS
VDD_RF
PMIC
VBAT
LDO
19.2
MHZXO
VBAT
Power on/off
Reset
Figure 2-3 L600 System Functional Architecture
2.2.2 Radio frequency function
RF Function Overview：

Dual -Band FULL Duplex FDD-LTE CATM1 B4/B13
The operating frequency range of the transmitter is shown in table 2-2.
Table 2-3 RF frequency band
Working band
Upstream band（Uplink）
Downlink frequency（Downlink）
FDD_LTE B4
1710 MHz~1755 MHz
2110 MHz~2155 MHz
FDD_LTE B13
777 MHz~787 MHz
746 MHz~ 756 MHz
Table 2-4 Conducted transmission power
Working Band
Max Power
Min Power
FDD_LTE B4
23dBm +/-2.7dB
<-40dBm
FDD_LTE B13
23dBm +/-2.7dB
<-40dBm
Table 2-6 Reference sensitivity (QPSK)
Channel bandwidth
Copyright © Shanghai Mobiletek Communication Ltd
12
L600 Hardware Design
E-UTRA Band
1.4 MHz
3 MHz
5 MHz
10 MHz
15 MHz
20 MHz
Duplex Mode
-102.2
--
--
--
--
--
FDD
13
-98.7
--
--
--
--
--
FDD
Copyright © Shanghai Mobiletek Communication Ltd
13
L600 Hardware Design
3 Interface Description
3.1 PIN Definition
3.1.1 Pin I/O parameter definition
The I/O parameter definition of the product is shown in table 3-1.
Table 3-1 I/O parameter definitions
Pin attribute symbol
Description
PI
Power input PIN
PO
Power output PIN
AI
Analog input
AIO
Analog signal input/output PIN
I/O
Digital signal input/output PIN
DI
Digital signal input
DO
Digital signal output
DOH
Digital output with high level
DOL
Digital output with low level
PD
Pull down
PU
Pull up
AO
Analog output
3.1.2 Pin Map
L600 is a extremely small LCC package module and special design for the IOT marketing, and it’s
have integrated rich peripheral interface. Such as SIM , USB ,PCM ,UART and interactive interface,
detail description show as below chart. All hardware interfaces which connect L600 to customers’
application platform are through 64 pins pads (Metal half hole). Figure 3-1 is L600 PIN outline
diagram.
Copyright © Shanghai Mobiletek Communication Ltd
14
L600 Hardware Design
49
NC
SPI_MOSI
2#
48
FLIGHTMODE
SPI_MISO
3#
47
WAKEUP_OUT
SPI_CLK
46
WAKEUP_IN
GND
45
GND
USB_HS_DM
44
I2C_SDA
USB_HS_DP
43
I2C_SCL
GND
42
MB_GPIO_0
USB_VBUS
41
GND
40
VREG_L11_1P8
SPI_CS
Top View
USB_ID
10
GND
11
39
NETLIGHT
UIM_CLK
12
38
NC
UIM_RESET
13
37
RESET_N
UIM_DATA
14
36
PHONE_ON_N
UIM_PRESENT
15
35
ADC1
VREG_L6_UIM
16
34
ADC2
GND
17
33
NC
Figure 3-1 Pin Map View (Top View)
Note:1. # flag Pin standard this pin is a Multi-function pin and it’s integrated different function in
different system status, and the detail function please refer to the correspond chapter.
3.1.3 PIN Definition and function description
Table 3-2 Pin definition
Pin No.
Pin description
Pin No.
Pin description
SPI_CS
SPI_MOSI
SPI_MISO
SPI_CLK
GND
USB_HS_DM
USB_HS_DP
GND
Copyright © Shanghai Mobiletek Communication Ltd
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L600 Hardware Design
USB_VBUS
10
USB_ID
11
GND
12
UIM_CLK
13
UIM_RESET
14
UIM_DATA
15
UIM_PRESENT
16
VREG_L6_UIM
17
GND
18
ANT_MAIN
19
GND
20
GND
21
NC
22
NC
23
BOOT_CONFIG_0
24
NC
25
VBAT_RF
26
VBAT_RF
27
GND
28
GND
29
VBAT_BB
30
VBAT_BB
31
GND
32
GND
33
NC
34
ADC2
35
ADC1
36
PHONE_ON_N
37
RESET_N
38
NC
39
NETLIGHT
40
VREG_L11_1P8
41
GND
42
MB_GPIO_0
43
I2C_SCL
44
I2C_SDA
45
GND
46
WAKEUP_IN
47
WAKEUP_OUT
48
FLIGHTMODE
49
NC
50
GND
51
UART_RTS_N
52
UART_CTS_N
53
UART_RX
54
UART_TX
55
UART_RI
56
UART_DCD
57
UART_DTR
58
FORCE_USB_BOOT
59
STATUS
60
GND
61
PCM_OUT
62
PCM_IN
63
PCM_SYNC
64
PCM_CLK
Copyright © Shanghai Mobiletek Communication Ltd
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L600 Hardware Design
Table 3-3 Pin Function Description
Power interface
Pin Name
VBAT_BB
Pin No.
29,30
I/O
PI
Description
Content
Power supply voltage,
The power supply
VBAT=3.4V~4.2V.
for system Maximum
load current must
above
VBAT_RF
25,26
PI
2A.
Keep
Power supply voltage,
de-cap
capacitor
VBAT=3.4V~4.2V.
close to the this
Net.
VREG_L6_UIM
16
PO
Module
LDO
output
power,
dual-voltage
output,
Max
current
300mA.
Only
use
for
external SIM Card
VDD.
If not use please
Module
VREG_L11_1P8
40
PO
power
LDO
for
output
MCP
and
accessories
let it open or add
10
uF
de-cap
capacitor
to
ground.
5,8,11,17,19,2
GND
0,27,28,31,32,
--
Ground.
Description
41,45,50,60
System control interface
Pin Name
Pin No.
I/O
PHONE_ON_N
36
DI
RESET_N
37
DI
Content
System power on/off
input, active low.
System reset input,
active low.
The input signal, used
FLIGHTMODE
48
DI, PU
to control the system
Pull
UP
to
into flight mode, L:
VDD_1V8（PIN 40）
flight mode; H: normal
with 10K resistor
mode
Interactive interface
Pin Name
Pin No.
I/O
NETLIGHT
51
DO
Description
Identify
40
DO
system
network status.
Module
STATUS
the
Content
status
identify: High level
power on, low level
Copyright © Shanghai Mobiletek Communication Ltd
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L600 Hardware Design
power off.
WAKEUP_IN
46
DI
AP weak up module
WAKEUP_OUT
47
DO
Module wake up AP
Pin No.
I/O
Description
SIM interface
Pin Name
Content
Input pin as USIM card
UIM_PRESENT
15
DI，PU
detect pin.
If not use keep it
H: UIM is removed
open.
L: UIM is inserted
USIM Card data I/O,
which has been
pulled up with a 10KR
resistor to
UIM_DATA
14
I/O
UIM_VDD in module. Do
not pull
up or pull down in
users’ application
circuit.
All signals of
UIM_RESET
13
DO
UIM Reset
USIM
UIM_CLK
12
DO
UIM Clock
interface should
UIM Card Power output,
be protected with
output
ESD/EMC.
Voltage depends on UIM
mode
UIM_VDD
16
PO
automatically， and
one is
3.0V±10%, another is
1.8V±10%.
Current is less than
50mA.
PCM interface
Pin Name
Pin No.
I/O
Description
PCM_CLK
64
DO
PCM data bit clock.
PCM_SYNC
63
DO
PCM_IN
62
DI
PCM data input.
PCM_OUT
61
DO
PCM data output.
Pin Name
Pin No.
I/O
Description
RTS
51
DI
DET Request to send.
PCM data frame sync
signal.
Content
If not use keep it
open.
FULL UART
Copyright © Shanghai Mobiletek Communication Ltd
Content
If not use keep it
open.
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L600 Hardware Design
If not use keep it
CTS
52
DO
Clear to Send.
RX
53
DI
Receive Data.
RI
55
DO
Ring Indicator.
DCD
56
DO
Carrier detects.
TX
54
DO
Transmit Data.
DTR
57
DI
DTE get ready.
Pin Name
Pin No.
I/O
Description
Content
I2C_SCL
43
DO
I2C clock output.
If not use keep it
I2C_SDA
44
I/O
I2C data input/output.
open.
Pin Name
Pin No.
I/O
Description
Content
MAIN _ANT
18
AIO
Main Antenna
Pin No.
I/O
Description
open.
If not use keep it
open.
If not use keep it
open.
If not use keep it
open
If not use keep it
open.
If not use keep it
open.
I2C interface
RF port
Others
Pin Name
Content
Analog conversion
ADC1
ADC2
35
34
AI
AI
digital input
interface1
If not use keep it
Analog conversion
open.
digital input
interface2
Pull up to 1.8V (L600
FORCE_USB_BOOT
58
I/O
VDD_1V8)
with
10K
resistor force module
in USB download mode
Pull up to 1.8V (L600
BOOT_CFG0
23
DI, PD
VDD_1V8)
with
10K
Recommend placing
test points for
debug.
resistor force module
in fastboot mode
Copyright © Shanghai Mobiletek Communication Ltd
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L600 Hardware Design
3.2 Operating condition
Table 3-4 module recommended operating condition
Parameter
Description
Min.
Typ.
Max.
Unit
VBAT
Main power supply for
3.4
3.8
4.2
the module
3.3 Digital I/O characteristics
Table 3-5 1.8V Digital I/O characteristics
Parameter
Description
Min.
Typ.
Max.
Unit
VIH
High level input voltage
0.7*VDD_PX
VDD_PX
VDD_PX+0.3
VIL
Low level input voltage
-0.3
0.2* VDD_PX
VOH
High level output voltage
VDD_PX-0.45
VDD_PX
VOL
Low level output voltage
0.45
IOH
High-level output current
mA
-2
mA
uA
-1
uA
(no pull down resistor)
IOL
Low-level output current
(no pull up resistor)
IIH
Input
high
leakage
current (no
pull down resistor)
IIL
Input low leakage current
(no pull up resistor)
*Note: 1. These parameters are for digital interface pins, such as SPI, I2C,GPIOs
UART, PCM, BOOT_CFGn.
2. L600 USIM card signal (USIM_CLK, USIM_DATA, USIM_RST) support dual-voltage (1.8V
and 3.0V) mode, and the DC character show in corresponding function block.
3.4 Power Interface
3.4.1 Power supply pin description
Table 3-6 DC Power Characteristics
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L600 Hardware Design
Pin No.
25,26
29,30
Net Name
Description
Power supply for
VBAT_RF
the module RF
Power supply for
VBAT_BB
the module RF
DC Characteristic（V）
Min.
Typ.
Max.
3.4
3.8
4.2
3.4
3.8
4.2
5,8,11,17,19,20,27
,28,31,32,41,45,50
GND
GND
,60
3.4.2 Power supply requirements
There are four VBAT PIN power for the module, VBAT directly power supply for the module
baseband and PA, and operating rating is 3.4V~4.2V; In the weak network environment, the antenna
will be maximum power emission. The peak current of the module under the 2G mode may reach the
peak current of 1.8A. power supply to reach 2A, the average current to reach 0.9A above. Due to the
launch of GSM/GPRS time slot pulse can cause VBAT power source instantaneous voltage drop,
maximum peak current can reach 2A, So the max power supply current must more than 2 A. Figure
3-2 sign for GSM/GPRS instantaneous pulse diagram.
Figure 3-2 GSM/GPRS instantaneous pulse
Table 3-7 VBAT power supply interface characteristics
Symbol
Description
VBAT
Power
supply
voltage
IVBAT(peak)
Power supply p
current
IVBAT(average)
Power
supply
Min
Typ
Max
Unit
3.4
3.8
4.2
2*
1.5
Copyright © Shanghai Mobiletek Communication Ltd
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L600 Hardware Design
average
current
IVBAT(power-off)
Power
supply
current
in power off
20
uA
mA
mode
IVBAT(power-save)
Power
supply
current
in power save
mode(sleep
mode)
3.4.3 Power Supply Design Guide
Make sure that the input voltage at the VBAT pin will never drop below 3.4V even during a
transmit burst when the current consumption rises up to more than 2A. If the power voltage drops
below 3.4V, the RF performance of module may be affected. Using large tantalum capacitors (above
300uF) will be the best way to reduce the voltage drops. If the power current cannot support up to 2A,
users must introduce larger capacitor (typical 1000uF) to storage electric power. 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 keep VBAT net wider than 2 mm to
minimize PCB trace impedance on circuit board. The following figure is the recommended circuit.
Figure 3-3 VBAT input application circuit
Note: The Cd, Ce, Cb, Cc and Cf are recommended being mounted for L600, but the Ca, Cb, Ce, Cc
and Cf for tune.
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L600 Hardware Design
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 3-8: Recommended Zener diode models
NO.
Manufacturer
Part Number
Power
Package
On semi
MMSZ5231BT1G
500mW
SOD123
Prisemi
PZ3D4V2H
500mW
SOD123
Vishay
MMSZ4689-V
500mW
SOD123
Crownpo
CDZ55C5V1SM
500mW
0805
3.4.4 Recommended Power supply circuit
If the voltage difference is not big,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 linear regulator power supply. The designed
output for the power supply is 3.8V.
Figure 3-4 Reference circuit of the LDO power supply
If there is a big difference between the input voltage and the desired output (VBAT) or better
efficiency is more important, a switching converter power supply will be preferable. The following
figure is the reference circuit.
Figure 3-5 Reference circuit of the DCDC power supply
Note: DCDC may deprave RF performance because of ripple current intrinsically.
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L600 Hardware Design
3.4.5 Power Supply Layout guide
The layout of the power supply section and the related components is of vital importance in the
power module design. If processes this part layout is not good, will lead to various effects, such as bad
EMC, effective the emission spectrum and receiving sensitivity, etc. So the power supply part design
is very important, when you design this part you should notes below contents: 1. DC DC switch power
should place away from the antenna and other sensitivity circuit; 2. Consider the voltage drop and the
module current requirement, the layout line should better above 100mil. If conditions allow should add
a power shape plane.
3.5 UIM interface
3.5.1 Pin definition
The L600 integrated a ISO 7816-2 standard USIM port, and the module can automatic identify the
voltage demo according the USIM to allow the mobile equipment to attach to the network. Both 1.8V
and 3.0V SIM Cards are supported.
Table 3-9 UIM Electronic characteristic in 1.8V mode (USIM_VDD =1.8V)
Symbol
Parameter
Min.
Typ.
Max.
Unit
UIM_VDD
LDO power output
1.75
1.8
1.95
VIH
High-level input voltage
VIL
Low-level input voltage
VOH
High-level output voltage
VOL
Low-level output voltage
0.65·UIM
_VDD
-0.3
UIM_VD
D -0.45
UIM_VD
-0
D +0.3
0.35·UIM
_VDD
UIM_VD
0.45
Table 3-10: USIM Electronic characteristic 3.0V mode (USIM_VDD =3.0V)
Symbol
Parameter
Min.
Typ.
Max.
Unit
UIM_VDD
LDO power output
2.75
3.0
3.05
VIH
High-level input voltage
VIL
Low-level input voltage
VOH
High-level output voltage
VOL
Low-level output voltage
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0.65*UIM
_VDD
-0.3
UIM_VD
D -0.45
UIM_VD
D +0.3
0.25·UIM
_VDD
UIM_VD
0.45
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L600 Hardware Design
3.5.2 Design Guide
UIM electronic characteristics as the table 3-9,3-10 show.
In order to meet the 3 GPP TS 51.010 1 protocol and EMC certification requirements. Suggest
UIM slot near the location of the module USIM card interface, to avoid running for too long, lead to
serious deformation of waveform and effect signal integrity, UIM_CLK and UIM_DATA signal lines
suggest ground protect. Between the UIM VCC & GND add a 1uF and a 33 pF capacitor in parallel,
Between the SIM_CLK& GND, UIM_RST& GND, UIM DATA& GND add a 33 pF capacitor in
parallel, for filter the RF signal interference.
3.5.3 UIM interface reference circuit
Figure 3-6 UIM Reference circuit
Note:1. UIM_DATA have added the pull-up resistance in the module design.
2. L600 support hot-plug detect, if need the function, please add this pin.
3.6 PCM interface
3.6.1 PCM interface definition
L600 provides hardware PCM interface for external codec. L600 PCM interface can be used in short
sync master mode only, and only supports 16 bits linear format：
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L600 Hardware Design
Table 3-11 PCM interface definition
Pin No.
Signal name
I/O Type
PCM
DC Characteristics（V）
Min.
Typ.
Max.
-0.3
1.8
1.9
63
PCM_SYNC
synchronizing
signal
62
PCM_DIN
PCM data input
-0.3
1.8
1.9
61
PCM_DOUT
PCM Data output
-0.3
1.8
1.9
64
PCM_CLK
PCM Data clock
-0.3
1.8
1.9
Figure 3-7 PCM_SYNC timing
Figure 3-8 Codec to L600 module timing
Figure 3-9 L600 to codec module timing
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L600 Hardware Design
Table 3-12 PCM interface Timing
DC characters
Parameter
T(sync)
T(synch)
T(syncl)
T(clk)
T(clkh)
Descriptions
Min.
Typ.
Max.
Unit
PCM_SYNC cycle
125
us
PCM_SYNC high level hold
488
ns
124.5
us
PCM_CLK cycle
488
ns
PCM_CLK high level hold
244
ns
time
PCM_SYNC low level hold
time
time
T(clkl)
PCM_CLK low level hold time
244
ns
T(susync)
PCM_SYNC establish time
122
ns
T(hsync)
PCM_SYNC hold time
366
ns
T(sudin)
PCM_IN establish time
60
ns
T(hdin)
PCM_IN hold time
60
ns
From PCM_CLK rising edge to
60
ns
60
ns
T(pdout)
PCM_OUT valid time
From PCM_CLK falling edge
T(zdout)
to
PCM_OUT
high
impendence delay time
3.6.2 PCM interface application
L600 only support the host mode, PCM_SYNC,PCM_CLK is the output pin，PCM_SYN as the
synchronizing output 8kHz sync signal. PCM Data support 8bit or 16bit data.
Copyright © Shanghai Mobiletek Communication Ltd
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L600 Hardware Design
Figure 3-10 PCM application circuit（L600 in host mode）
Note:1. L600 PCM port DC character is base on 1.8 voltage, please pay attention the voltage
matching.
2. If your design need this function, you should add the crystal for PCM clock. About the
crystal type please contact our market.
3. L600 default design base on NAU8814 as the codec chip, the detail design please refer to
《L600 reference design》.
3.7 USB2.0 interface
3.7.1 USB interface pin definition
L600 integrated a USB 2.0 port and low speed mode full speed mode and high speed mode
transmission speed between the AP and the host. Below table is the module USB pin definition
Table 3-13 USB interface pin definition
Pin No.
Signal name
I/O type
12
USB_DM
13
USB_DP
DC characteristic（V）
Min.
Typ.
Max.
USB2.0 date D-
USB2.0 data D+
3.7.2 USB Interface application
USB bus is mainly used for data transmission, software upgrading, module testing. Work in the
high-speed mode of the USB line, if you need ESD design, ESD protection device must meet the
junction capacitance value <5pf, otherwise the larger junction capacitance will cause waveform
distortion, the impact of bus communication. Differential impedance of differential data line in 90ohm
+ 10%. In your application must add a 47Kohm resistor between USB_VBUS to ground.
Copyright © Shanghai Mobiletek Communication Ltd
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L600 Hardware Design
Figure 3-11 USB application
3.8 UART Interface
3.8.1 Pin description
L600 module provides a flexible 7-wire UART (universal asynchronous serial transmission)
interface. UART as a full asynchronous communication interface, Support the standard modem
handshake signal control, Comply with the RS - 232 interface protocols. And also support four wire
serial bus interface or the 2-wire serial bus interface mode, and the module can be through the UART
interface for serial communication with the outside (DET) and the AT command input, etc. L600
module is a DCE (Data Communication Equipment) and client PC is a DTE (Data Terminal
Equipment).AT commands are entered and serial communication is performed through UART
interface. The pin signal is defined as shown in below table.
Table 3-14 UART pin definition
Pin No.
Pin
I/O type
Descriptions
54
UART_TX
DO
UART data transmission
53
UART_RX
DI
UART data receive
55
UART_RI
DO
Ring Indicator.
51
UART_RTS
DO
UART DET request to send
57
UART_DTR
DI
DTE get ready.
52
UART_CTS
DI
UART Clear to Send.
56
UART_DCD
DO
UART Carrier detects.
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L600 Hardware Design
Note：UART_RI, UART_DTR can be used as two line UART interface for system debugging, See
table 3-3 Pin functional description.
3.8.2 UART interface application
UART_RI, UART_DTR default status is the system log port, so we recommend that users keep
reserved the interface and test points in design. The L600 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. About the application as below:
Figure 3-12 UART 4 Line connection mode
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L600 Hardware Design
L600(DCE)
Serial Port
Client (DTE)
Serial Port
TXD1
TXD
RXD1
RXD
RTS1
RTS
CTS1
CTS
DTR1
DTR
DCD1
DCD
RING1
RING
GND
GND
Figure 3-13 UART 2 Line connection mode
Figure 3-14
UART Full mode
L600 UART is COMS 1.8V level, if the AP voltage level is not the 1.8V should add a voltage
transfer module in your application. Below is SP3238E application diagram.
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L600 Hardware Design
Figures 3-16 Voltage transfer Reference Circuit
3.9 Power on/off and reset interface
3.9.1 Pin definition
L600 can be powered on by pulling PWRKEY pin down to ground. This pin is already internal
pulled up to 1.8V in module, so external pull-up resistor is not necessary. Placing a100nF capacitor
and an ESD protection diode close to the PWRKEY pin is strongly recommended. Please refer to the
following figure for recommended reference circuitL600 also have a RESET pin to reset module. This
function is used as an emergency reset only when AT command “AT+CPOF” and the PWRKEY pin
has no effect. User can pull RESET pin to ground, then module will reset. This pin is already pulled up
with a 40KΩ resistor to 1.8V in module, so external pull-up resistor is not necessary. Placing a100nF
capacitor and an ESD protection diode close to the RESET pin is strongly recommended. Please refer
to the following figure for recommended reference circuit, you can pull-down this pin to ground and
hold about 200 MS and then release will force the module enter reset state.
Table 3-15 power on/off and reset key define
Pin No.
Net name
I/O Typ.
descriptions
36
PHONE_ON_N(PWRKEY)
DI
L600 power on/off pin (internal pull-up to
1.8V)
37
RESET_N
DI
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L600 RESET pin (internal pull-up to 1.8V)
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L600 Hardware Design
3.9.2 Power on sequence
Table 3-16 power on timing chart.
Ton
Power on low level pulse
100
500
--
ms
Ton(status)
Power on time (According to the
15
--
25
10
--
20
1.17
1.8
2.1
-0.3
0.3
STATUS pin judgment)
Ton(uart)
Power on time (according the UART
pin judgement)
VIH
Input high level voltage of
PWRKEY pin
VIL
Input low level voltage of PWRKEY
pin
Figures 3-17 Power on Timing sequence
Note: the STATUS pin can be used to identify whether has been power on, when the module has
access to electricity and initialization is completed, the STATUS output high level, or has
maintained low level.
3.9.3 Power off sequence
The following methods can be used to power down. 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 L600 by pulling the PWRKEY pin down
●
Method 2: Power off L600 by AT command “AT+CPOF”
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L600 Hardware Design
●
Method 3: over-voltage or under-voltage automatic power down.
● Method 4: over-temperature or under-temperature automatic power down.
Note: 1. About the AT command “AT+CPOF” detail please refer document [1].
2. Over-voltage or under-voltage may cause automatic power down.
3. Over-temperature or under-temperature may cause automatic power down.
Table 3-17 Power off timing chart.
Toff
The time of active low level
2.5
--
--
--
--
--
--
--
--
1.17
1.8
2.1
-0.3
0.3
pulse on PWRKEY pin to power off
module
Toff(status
The time from power-off issue to
STATUS pin output low level
(indicating power off)
Toff(uart)
The time from power-off issue to
UART port off
Toff-on
The buffer time from power-off
issue to power-on issue
VIH
Input high level voltage of
PWRKEY pin
VIL
Input low level voltage of PWRKEY
pin
User can power off the L600 by pulling PWRKEY down to ground for a specific time. The
power off scenario is illustrated in the following figure.
Figures 3-18 Power off Timing sequence
Note: the STATUS pin can be used to identify whether has been power on, when the module has
access to electricity and initialization is completed, the STATUS output high level, or has
maintained low level.
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L600 Hardware Design
3.9.4 Reset sequence
L600 can lower module RESET pin to restart the module.
Table 3-18 Reset pin electrical properties
Symbol
Net name
Min.
Typ.
Max.
Unit
Treset
Reset pin low level hold time
50
100
500
ms
VIH
Reset pin input high level
1.17
1.8
2.1
VIL
Reset pin input low level
-0.3
0.3
Note: it is recommended that only in an emergency, such as module without response, use the
RESET pin. In addition, under the module power off status the RESET pin is invalid.
3.9.5 Power on/off and reset interface application
Figure 3-19: Reference power on/off reset circuit
Another way to control the PWRKEY pin is directly using a push button switch. Need to set a button near
the TVS to ESD protection. The image below for reference circuit:
Copyright © Shanghai Mobiletek Communication Ltd
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L600 Hardware Design
Figure 3-20: power on/off and reset recommended circuit (physical buttons)
3.10 Interactive interface
3.10.1 Pin definition
Table 3-19 list the interface is mainly with the application processor interactive interface,
including query, wake up four types, status indication, flight mode interface.
Table 3-19 Interactive interface
Pin No.
Signal
I/O type
Descriptions
46
GPIO_2/WAKEUP_IN
DI
Default: GPIO
Optional: Input pin as wake up interrupt
signal to module from host.
47
GPIO_1/WAKEUP_OU
Default: GPIO
Optional: Output pin as the module wake up
the AP
59
STATUS
DO
AP inquire the module status
48
FLGHTMODE
DI
Pull up to 1.8V made the system enter in
flight mode, at this mode will tune off all
the wireless function
42
GPIO_0
DO
General GPIO module output (used for
keyboard backlighting, etc.)
28
GPIO_3
I/O
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GPIO
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L600 Hardware Design
3.10.2 interactive interface application
L600 provides three shook hands with application processor communication signals. Application
processor can query whether the module boot normal work through STATUS. Through the
WAKEUP_OUT query module is in sleep mode, and sleep in the module, through WAKEUP_IN
wake module. Similarly, when application processor in the sleep state, the L600 modules can through
WAKEUP_OUT wake application processor.

STATUS：Module sleep instructions, high level indicator to sleep, low level instructions for the
awakened state;

WAKEUP_IN： The host can lower the signal awakens the module，If, low level has maintained,
module can't sleep.

WAKEUP_OUT: when L600 need to communicate with the AP, module can be set this pin for low
level to awaken application processor.

FLGHTMODE：Through the external output high level module into flight mode;
FLIGHTMODE pin can be used to control module to enter or exit the flight mode. In flight mode, L600 internal
radio frequency circuit is closed. FLIGHTMODE reference circuit as shown in the figure below:
Figure 3-21: Flight mode recommended circuit (physical buttons)
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L600 Hardware Design
3.11 Net Light interface
3.11.1 Pin define
Table 3-20 LED pin definitions
Pin No.
Net name
I/O type
description
39
NETLIGHT
DO
Module net state identify control LED port
3.11.2 Net light application
The L600 module has 1 pins for controlling the LED display, which can be used as an indicator
of network connection status. Different network states are represented by the mode of the flashing
light. This pin is an GPIO，with An external NPN Transistor，External connect VBAT can directly
drive LED. Drive current capacity varies according to external NPN model，recommend use
DTC143ZEBTL，Drive current biggest can reach 100 mA, below is the reference circuit.
LED
R1
L600
R2
Figure 3-22 Status indicator reference circuit
Note: R1, R2 value according to the voltage VLED and LED working current.
Table 3-21 NETLIGHT status
Net Status
Module working status
Always on
Searching Network/Call Connect
200ms ON, 200ms OFF
Data Transmit
800ms ON, 800ms OFF
Registered network
OFF
Power off / Sleep
Note: NETLIGHT output low level as “ON”, and high level as “OFF”.
Copyright © Shanghai Mobiletek Communication Ltd
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L600 Hardware Design
3.12 System boot configuration and download
3.12.1 Pin definition
L600 can configure BOOT_CONFIG (Boot Configuration) pin to Configuration module power-on
mode and the forced entry USB download mode.
Table 3-23 Boot configuration and force USB download
Pin No.
Net name
Function description
23
BOOT_CFG0
Pull up this pin change boot
note
configuration register value
58
GPIO(System
FOCE_USB_BOOT
Pull up this pin change boot
Multiplex
on)
(before system
configuration register value
pin
on)
3.12.2 Boot configuration and force USB interface application
Figure 3-25 boot configuration and force USB download recommended circuit
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L600 Hardware Design
3.13 Analog and Digital conversion (ADC) interface
L600 integrated two analog-to-digital conversion interface, specific parameters are as follows:
Table 3-25 ADC1, ADC2 characters
characters
Min.
Typ.
Max.
Unit
ADC resolution
--
15
--
Bits
Transfer time
--
442
--
ms
Input voltage range
0.3
--
VBAT
Input resistance
--
--
MΩ
Note: 1. use "AT + CADC" and "AT + CADC2" can read ADC1 and ADC2 voltage on the pin.
More information please refer to the document [1].
2. The need for special software version to support access to the ADC.
3.14 I2C interface
3.14.1 I2C pin definition
I2C is used to communicate with peripheral equipment and can be operated as either a transmitter or
receiver, depending on the device function. Both SDA and SCL are bidirectional lines connected with
I2C interface. Its operation voltage is 1.8V. High speed mode transmission rate can reach 400 KBPS,
Because L600 haven’t internal pulled up to the I2C interface, so in your design need pull up. Below
figure is the reference design:
Figure 3-28 I2C reference design
Note: 1. L600 I2C only support host mode.
2. Only special software version support inquire the I2C.
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L600 Hardware Design
3.15 Antenna interface
3.15.1 RF signal PCB layout guide
L600 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. we recommends that the total insertion loss between the
antenna pad and antenna should meet the following requirements:
● LTE (F<1GHz) <0.5dB
● LTE (1GHz
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