YUGE CLM920 NC3 User manual

Product Name
CLM920_NC3_LTE Module hardware manual
Number of Pages
74
Produce Version
V2.2
Date
2019/10/30
CLM920_NC3_LTE
Module hardware manual
V2.2
Shanghai Yuge Information Technology co., LTD
All rights reserved

CLM920_NC3_LTE Module hardware manual
Shanghai Yuge Information Technology co., LTD
- 2 -
History record
Version
Date
Description
Author
V2.0
20180126
Initial
David
V2.1
2019/9/2
1.Modify the USIM reference circuit
Document group
V2.2
2019/10/30
1.Modify some editing errors
Document group

CLM920_NC3_LTE Module hardware manual
Shanghai Yuge Information Technology co., LTD
- 3 -
Contents
Chapter 1. Introduction...........................................................................................................- 9 -
Chapter 2. Module review.................................................................................................... - 10 -
2.1Module introduction................................................................................................ - 10 -
2.2 Module characteristics............................................................................................- 10 -
2.3 Module function..................................................................................................... - 14 -
Chapter 3. Interface application description.........................................................................- 16 -
3.1 Chapter overview....................................................................................................- 16 -
3.2 Module interface.....................................................................................................- 17 -
3.2.1 144-pin LCC interface.................................................................................- 17 -
3.2.2 Interface definition...................................................................................... - 18 -
3.3 Power interface.......................................................................................................- 25 -
3.3.1 Power supply design....................................................................................- 25 -
3.3.2 Power reference circuit................................................................................- 26 -
3.3.3 VDD_SDIO 1.8V/2.85V Voltage output..................................................... - 28 -
3.3.4 VDD_EXT 1V8 Voltage output...................................................................- 28 -
3.4 Switching machine reset mode...............................................................................- 28 -
3.4.1 Boot............................................................................................................. - 28 -
3.4.2 Boot timing..................................................................................................- 29 -
3.4.3 Shut down....................................................................................................- 30 -
3.4.4 Reset control................................................................................................- 30 -
3.5 USB interface......................................................................................................... - 31 -
3.6 UART interface...................................................................................................... - 33 -
3.6.1 Main serial port............................................................................................- 33 -
3.6.2 Debug serial port......................................................................................... - 35 -
3.6.3 RI and DTR interface.................................................................................. - 35 -
3.7 USIM interface....................................................................................................... - 36 -
3.7.1 USIM card reference circuit........................................................................ - 37 -
3.7.2 UIM_DET Hot Swap Reference Design..................................................... - 38 -
3.8 General purpose GPIO interface............................................................................ - 39 -
3.9 Network status indication interface........................................................................ - 40 -
3.10 Module status indication.......................................................................................- 41 -
3.11 PCM digital voice interface..................................................................................- 42 -

CLM920_NC3_LTE Module hardware manual
Shanghai Yuge Information Technology co., LTD
- 4 -
3.12 I2C bus................................................................................................................. - 43 -
3.13 SDIO interface......................................................................................................- 44 -
3.14 SPI interface / multiplexed I2S interface..............................................................- 49 -
3.15 MCLK interface....................................................................................................- 50 -
3.16 ADC interface.......................................................................................................- 51 -
3.17 RF interface.......................................................................................................... - 51 -
3.17.1 Main antenna interface.............................................................................. - 52 -
3.17.2 Diversity antenna interface........................................................................- 52 -
3.17.3 GNSS interface..........................................................................................- 52 -
3.17.4 RF trace reference......................................................................................- 54 -
3.17.5 RF connector size...................................................................................... - 55 -
Chapter 4. Overall technical indicators................................................................................ - 58 -
4.1 Chapter overview....................................................................................................- 58 -
4.2 GNSS Receiving performance............................................................................... - 58 -
4.3 Working frequency................................................................................................. - 59 -
4.4 Conducted radio frequency measurement.............................................................. - 60 -
4.4.1 Test environment......................................................................................... - 60 -
4.4.2 Standard test................................................................................................ - 60 -
4.5 Conducted receiving sensitivity and transmit power..............................................- 60 -
4.6 Antenna requirements.............................................................................................- 61 -
4.7 Power consumption characteristics........................................................................ - 63 -
Chapter 5. Interface electrical characteristics.......................................................................- 66 -
5.1 Chapter overview....................................................................................................- 66 -
5.2 Working storage temperature..................................................................................- 66 -
5.3 Module IO level......................................................................................................- 66 -
5.4 Power supply.......................................................................................................... - 66 -
5.5 Electrostatic property..............................................................................................- 67 -
5.6 Reliability index..................................................................................................... - 67 -
Chapter 6. Structural and mechanical properties..................................................................- 70 -
6.1 Chapter overview....................................................................................................- 70 -
6.2 Exterior................................................................................................................... - 70 -
Chapter 7. Packaging and production...................................................................................- 73 -
7.1 Chapter overview....................................................................................................- 73 -
7.2 Module packaging and storage...............................................................................- 73 -

CLM920_NC3_LTE Module hardware manual
Shanghai Yuge Information Technology co., LTD
- 5 -
7.3 Production welding.................................................................................................- 73 -
Chapter 8. Appendix.............................................................................................................- 75 -
8.1 Chapter overview....................................................................................................- 75 -
8.2 Abbreviations..........................................................................................................- 75 -
8.3 Encoding.................................................................................................................- 76 -
8.4 Safety and precautions............................................................................................- 79 -
Figure
Figure 2-1 Functional block diagram of the CLM920 NC3 LCC module........................... - 15 -
Figure 3-1 LCC module interface definition........................................................................ - 17 -
Figure 3-2 GSM TDMA network burst current supply voltage drop................................... - 26 -
Figure 3-3 VBAT power supply........................................................................................... - 26 -
Figure 3-4 LDO linear power supply reference circuit........................................................ - 27 -
Figure 3-5 DC switching power supply reference circuit.................................................... - 27 -
Figure 3-6 PMOS tube control power switch reference circuit............................................- 27 -
Figure 3-7 Startup timing diagram....................................................................................... - 29 -
Figure 3-8 Power-on reference circuit..................................................................................- 30 -
Figure 3-9 Reset reference circuit........................................................................................ - 30 -
Figure 3-10 Reset timing diagram........................................................................................- 31 -
Figure 3-11 USB connection design circuit diagram........................................................... - 32 -
Figure 3-12 Full-featured serial port design.........................................................................- 34 -
Figure 3-13 UART serial port design................................................................................... - 34 -
Figure 3-14 Level conversion chip circuit............................................................................- 35 -
Figure 3-15 RI pin signal waveform.................................................................................... - 36 -
Figure 3-16 USIM design circuit diagram............................................................................- 37 -
Figure 3-17 Hot swap detection of the USIM card.............................................................. - 39 -
Figure 3-18 Network indicator circuit diagram....................................................................- 41 -
Figure 3-19 STATUS Pin Reference Circuit........................................................................ - 41 -
Figure 3-20 PCM short frame mode timing diagram........................................................... - 43 -
Figure 3-21 PCM to analog voice map.................................................................................- 43 -
Figure 3-22 I2C interface reference circuit diagram............................................................ - 44 -
Figure 3-23 SD card interface reference circuit diagram..................................................... - 48 -
Figure 3-24 I2S to analog voice map................................................................................... - 50 -

CLM920_NC3_LTE Module hardware manual
Shanghai Yuge Information Technology co., LTD
- 6 -
Figure 3-25 Main antenna matching circuit......................................................................... - 52 -
Figure 3-26 Diversity Antenna Matching Circuit.................................................................- 52 -
Figure 3-27 GNSS passive antenna reference circuit...........................................................- 53 -
Figure 3-28 GNSS active antenna reference circuit............................................................. - 53 -
Figure 3- 29 The complete structure of the two-layer PCB microstrip line.........................- 55 -
Figure 3-30 The complete structure of the multilayer PCB strip line.................................. - 55 -
Figure 3-31 Reference ground is the third layer PCB microstrip transmission line structure- 55 -
Figure 3-32 RF connector size chart.................................................................................... - 56 -
Figure 3-33 Antenna connector matching plug diagram...................................................... - 56 -
Figure 3-34 Matching coaxial RF line size.......................................................................... - 57 -
Figure 6-1 Appearance of the CLM920 NC3....................................................................... - 70 -
Figure 6-2 Front view and side view of the module (unit: mm).......................................... - 71 -
Figure 6-3 Bottom view of the module (unit: mm).............................................................. - 71 -
Figure 6-4 Recommended module package (unit: mm)....................................................... - 72 -
Figure 7-1 Reflow soldering temperature graph.................................................................. - 74 -
Table
Table 2-1 Module band list...................................................................................................- 10 -
Table 2-2 Key Features.........................................................................................................- 11 -
Table 3-1 Pin definitions...................................................................................................... - 18 -
Table 3-2 IO parameter definition........................................................................................ - 20 -
Table 3-3 Pin description......................................................................................................- 20 -
Table 3-4 Power pin definitions........................................................................................... - 25 -
Table 3-5 Switching machine pin definition........................................................................ - 28 -
Table 3-6 Boot timing parameters........................................................................................ - 29 -
Table 3-7 Reset foot definition............................................................................................. - 30 -
Table 3-8 RESET pin parameters......................................................................................... - 31 -
Table 3-9 USB interface pin definition................................................................................ - 31 -
Table 3-10 UART serial port signal definition..................................................................... - 33 -
Table 3-10 Debugging serial port pin definitions.................................................................- 35 -
Table 3-11 SIM card signal definition.................................................................................. - 36 -
Table 3-12 SIM card hot swap detection pin definition....................................................... - 38 -
Table 3-13 General GPIO Pin Definitions............................................................................- 39 -
Table 3-14 Network indicator pin definition........................................................................ - 40 -

CLM920_NC3_LTE Module hardware manual
Shanghai Yuge Information Technology co., LTD
- 7 -
Table 3-15 Network indication status...................................................................................- 40 -
Table 3-16 PCM pin definition.............................................................................................- 42 -
Table 3-17 PCM specific parameters................................................................................... - 42 -
Table 3-18 I2C pin definition............................................................................................... - 43 -
Table 3-19 SD card pin definition........................................................................................ - 44 -
Table 3-20 SPI Pin Definitions.............................................................................................- 49 -
Table 3-21 I2S pin definition................................................................................................- 49 -
Table 3-22 CLK Pin Definition............................................................................................ - 50 -
Table 3-23 ADC Pin Definitions.......................................................................................... - 51 -
Table 3-24 Antenna interface pin definition.........................................................................- 51 -
Table 3-25 Main parameters of the RF connector................................................................ - 56 -
Table 4-1 Main parameters of GNSS................................................................................... - 58 -
Table 4-2 RF frequency table............................................................................................... - 59 -
Table 4-3 Test instruments....................................................................................................- 60 -
Table 4-4 2G3G RF indicators............................................................................................. - 60 -
Table 4-5 4G RF sensitivity indicators.................................................................................- 60 -
Table 4-6 4G RF transmit power indicators......................................................................... - 61 -
Table 4-7 Main set antenna indicator requirements............................................................. - 61 -
Table 4-8 GNSS antenna specifications............................................................................... - 62 -
Table 4-9 Sleep and idle power consumption of the three major operators (GNSS off)......- 63 -
Table 4-10 Call Power Consumption (GNSS Off)............................................................... - 63 -
Table 4-11 GPRS data transmission power consumption (GNSS off)................................. - 64 -
Table 4-12 EDGE Data Transmission Power Consumption (GNSS Off)............................ - 64 -
Table 4-13 HSDPA data transmission power consumption (GNSS off).............................. - 64 -
Table 4-14 TD-SCDMA Data Transmission Power Consumption (GNSS Off).................. - 64 -
Table 4-15 EVDO data transmission power consumption (GNSS off)................................- 64 -
Table 4-16 LTE data transmission power consumption (GNSS off)....................................- 64 -
Table 5-1 CLM920 NC3 module working storage temperature...........................................- 66 -
Table 5-2 Electrical Characteristics of CLM920 NC3 Module............................................- 66 -
Table 5-3 CLM920 NC3 Module Operating Voltage........................................................... - 66 -
Table 5-4 CLM920 NC3 ESD Features................................................................................- 67 -
Table 5-5 CLM920 NC3 Reliability Test............................................................................. - 67 -
Table 7-1 Reflow process parameter table........................................................................... - 74 -
Table 8-1 Abbreviations....................................................................................................... - 75 -

CLM920_NC3_LTE Module hardware manual
Shanghai Yuge Information Technology co., LTD
- 8 -
Table 8-2 Time slot allocation table for different levels of GPRS/EDGE............................- 76 -
Table 8-3 Maximum GPRS rate........................................................................................... - 77 -
Table 8-4 Maximum EDGE Rate......................................................................................... - 77 -
Table 8-5 Maximum HSDPA rate.........................................................................................- 77 -
Table 8-6 Maximum HSUPA rate.........................................................................................- 78 -
Table 8-7 LTE-FDD DL maximum rate............................................................................... - 78 -
Table 8-8 LTE-FDD UL Maximum Rate............................................................................. - 79 -

CLM920_NC3_LTE Module hardware manual
Shanghai Yuge Information Technology co., LTD
- 9 -
Chapter 1. Introduction
This document is a wireless solution product CLM920 NC3, CLM920 TB3, CLM920
TE3 module hardware interface manual, designed to describe the hardware components and
functional characteristics of the module solution, application interface definition and
application instructions, electrical performance and mechanical characteristics. Combined
with this and other application documents, users can quickly use this module to design
wireless products.

CLM920_NC3_LTE Module hardware manual
Shanghai Yuge Information Technology co., LTD
- 10 -
Chapter 2. Module review
2.1Module introduction
CLM920 NC3 module is an LCC package module, which is an integrated
FDD-LTE/TDD-LTE/TD-SCDMA/WCDMA/EVDO/CDMA/EDGE/GSM and other wireless
terminal products for network standards and GPS location services. The module is based on
Qualcomm MDM9X07 chip development, supports Cat4, uplink and downlink speeds up to
50Mbps/150Mbps, and fully supports VOLTE and SRLTE, and supports embedded operating
systems such as Windows / Wince / Android / Linux.
The CLM920 NC3 module can be used in the following applications：
Car Equipment
Wireless POS machine
Wireless advertising, multimedia
Remote monitoring
Smart meter reading
Mobile broadband
automated industry
Other wireless terminals, etc.
2.2 Module characteristics
Table 2-1 Module band list
Network
Type
Frequency band
Module series
CLM920 NC3
CLM920 TB3
CLM920 TE3
GSM
GSM850
●
●
●
GSM900
●
●
●
GSM1800
●
●
●
LTE(FDD)
LTE FDD B1
●
●
●
LTE FDD B3
●
●
●
LTE FDD B5
●
●
●
LTE FDD B7
●
LTE FDD B8
●
●
●
LTE FDD B20
●

CLM920_NC3_LTE Module hardware manual
Shanghai Yuge Information Technology co., LTD
- 11 -
LTE(TDD)
LTE TDD B38
●
●
●
LTE TDD B39
●
●
●
LTE TDD B40
●
●
●
LTE TDD B41
●
●
●
TD-SCDMA
TD-SCDMA B34
●
●
●
TD-SCDMA B39
●
●
●
WCDMA
BAND 1
●
●
●
BAND 5
●
●
●
BAND 8
●
●
●
CDMA2000
/EVDO
BC0
●
GNSS
GLONASS
●
●
●
GPS
●
●
●
BeiDou/Compass
●
●
●
The module does not support diversity, GPS, voice function by default.
GNSS function optional
Diversity function optional
Voice function (digital voice)
CLM920 TB3 supports CAT1 standard modules for customer-specific applications, Mbps
for uplink CAT1 and 10Mbps for CAT1
The module supports Category 4 by default. When the Category 1 module is required, the
CLM920 TB3 cat1 is printed on the module label. CAT1 does not support diversity.
Table 2-2 Key Features
characteristic
description
Physical characteristics
32mm x 29mm x 2.4mm
Fixed way
LCC package, patch mount
Application processor
Single core ARM Cortex-A7 processor, clocked at
1.2GHZ, 256kB level 2 cache
Operating Voltage
3.3V - 4.2V Typical Voltage 3.7V
Energy saving current
Standby current < 5mA

CLM920_NC3_LTE Module hardware manual
Shanghai Yuge Information Technology co., LTD
- 12 -
Appl
icati
on
inter
face
Standard SIM
interface
Support 3.0V/1.8V, support hot swap function
USB2.0
USB2.0 (High-Speed) (only supports slave mode), data
transfer rate up to 480Mbps
For AT commands, data transfer, GNSS NMEA output,
software debugging and software upgrades
USB driver: support Windows / Wince / Android /
Linux, etc.
Hardware reset
interface
Used to reset the module, low effective
UART serial
interface
Main serial port (8 lines):
For AT commands and data transfer
The baud rate is up to 921600bps and the default is
115200bps.
Support RTS and CTS hardware flow control
Debug serial port (2 lines):
Used to print module logs
PCM interface
For audio, requires an external codec chip
Supports 8-bit μ-law and 16-bit linear encoding
formats
Support short frame mode
Support main mode
SPI interface
Maximum clock rate up to 26MHz
SPI can only be used as the master, the interface voltage
domain is 1.8V
Reusable I2S interface for external CODEC
SD card interface
4-bit SD/MMC interface
Clock frequency up to 50MHz
Maximum capacity supports 32GB
Interface voltage domain is 1.8/2.95V, two voltages are
adjustable
Power interface
Support 3.3V-4.2V DC power supply
Network status
indication
Used to indicate the status of the module, the speed of
the light is on to indicate different module status

CLM920_NC3_LTE Module hardware manual
Shanghai Yuge Information Technology co., LTD
- 13 -
General purpose
GPIO interface
WAKEUP_IN sleep mode control, low wake-up module
AP_READY sleep state detection
W_DISABLE# flight mode control
Transmit power
LTE:
Class 3 (23dBm±2dB)
UMTS:
Class 3 (24dBm+1/-3dB)
TD-SCDMA:
Class 2 (24dBm+1/-3dB)
CDMA2000：
Class 3 (24dBm+3/-1dB)
GSM/GPRS:
Class 4 (33dBm±2dB) GSM850/GSM900
Class 1 (30dBm±2dB) DCS1800/PCS1900
Data service
GSM/EDGE:
GPRS: DL 85.6 kbps/UL 85.6 kbps
EDGE: DL 236.8 kbps/UL 236.8 kbps
WCDMA:
UMTS R99：DL 384 kbps/UL 384 kbps
DC-HSPA+: DL 42 Mbps/UL 5.76 Mbps
TD-SCDMA:
TD-HSDPA/HSUPA: 2.2Mbps（UL）/2.8Mbps（DL）
EV-DOr0/DOrA
CDMA 1xEVDOr0: DL 2.4Mbps/UL 153kbps
CDMA 1xEVDOrA: DL 3.1Mbps/UL 1.8Mbps
LTE:
LTE FDD:DL 150Mbps/UL 50Mbps@20M BW cat4
LTE TDD:DL 130Mbps/UL 35Mbps@20M BW cat4
LTE FDD:DL 10Mbps/UL 5Mbps@20M BW cat1
LTE TDD:DL 10Mbps/UL 5Mbps@20M BW cat1
Satellite positioning
GPS/BEIDOU/GLONASS
Protocol：NMEA
Diversity antenna
Support LTE diversity antenna
AT command
Support for standard AT instruction sets (Hayes 3GPP

CLM920_NC3_LTE Module hardware manual
Shanghai Yuge Information Technology co., LTD
- 14 -
TS 27.007 and 27.005)
Specific AT query AT instruction set
SMS business
Support Text and PDU mode
Support point-to-point MO and MT
SMS storage: USIM card / ME (default)
Virtual network card
Support USB virtual network card
Temperature range
Normal operating temperature -30 °C to + 75 °C
Extreme operating temperature -40 °C to + 85 °C
Storage temperature
-40℃to + 85℃
Humidity
RH5%～RH95%
Module function distinction
On the label paper, M stands for the main set, D takes
the table diversity, and G stands for GPS
When the temperature is in the range of –40 °C to –30 °C or +75 °C to
+85 °C, some RF indicators of the CLM920 NC3 module may not meet the 3GPP
standards.
2.3 Module function
CLM920 NC3 LCC module mainly contains the following circuit units：
Baseband processing unit
Power management unit
Memory unit
RF transceiver unit
RF front end unit
GPS RF receiving unit.

CLM920_NC3_LTE Module hardware manual
Shanghai Yuge Information Technology co., LTD
- 15 -
The functional block diagram of the CLM920 NC3 LCC module is shown below：
Figure 2-1 Functional block diagram of the CLM920 NC3 LCC module

CLM920_NC3_LTE Module hardware manual
Shanghai Yuge Information Technology co., LTD
- 16 -
Chapter 3. Interface application description
3.1 Chapter overview
This chapter mainly describes the interface definition and application of this module.
Contains the following sections：
144 pin pin definition map
Interface definition
Power interface
USB interface
USIM interface
UART interface
Control interface
PCM/I2S voice interface
RF antenna interface
GPIO interface
Reserved
NC interface
SPI interface
SDIO interface

CLM920_NC3_LTE Module hardware manual
Shanghai Yuge Information Technology co., LTD
- 17 -
3.2 Module interface
3.2.1 144-pin LCC interface
Figure 3-1 LCC module interface definition

CLM920_NC3_LTE Module hardware manual
Shanghai Yuge Information Technology co., LTD
- 18 -
3.2.2 Interface definition
The CLM920_NC3 module is an LCC interface module. The module interface is defined
as shown in the following table：
Table 3-1 Pin definitions
Pin
Pin name
Pin
Pin name
1
WAKEUP_IN
2
AP_READY
3
GPIO_1
4
W_DISABLE#
5
GPIO_2
6
NET_STATUS
7
VDD_EXT
8
GND
9
GND
10
GND
11
DBG_RXD
12
DBG_TXD
13
USIM_DET
14
USIM_VDD
15
USIM_DATA
16
USIM_CLK
17
USIM_RST
18
RESERVED
19
GND
20
RESET_N
21
PWRKEY
22
GND
23
RESERVED
24
PCM_IN
25
PCM_OUT
26
PCM_SYNC
27
PCM_CLK
28
SDC2_DATA3
29
SDC2_DATA2
30
SDC2_DATA1
31
SDC2_DATA0
32
SDC2_CLK
33
SDC2_CMD
34
VDD_SDIO
35
ANT_DIV
36
GND
37
SPI_CS_N（I2S_D1）
38
SPI_MOSI（I2S_WS）
39
SPI_MISO（I2S_D0）
40
SPI_CLK（I2S_SCLK）
41
I2C_SCL
42
I2C_SDA
43
RESERVED
44
ADC1
45
ADC0
46
GND
47
ANT_GNSS
48
GND
49
ANT_MAIN
50
GND
51
GND
52
GND

CLM920_NC3_LTE Module hardware manual
Shanghai Yuge Information Technology co., LTD
- 19 -
53
GND
54
GND
55
RESERVED
56
GND
57
VBAT
58
VBAT
59
VBAT
60
VBAT
61
STATUS
62
RI
63
DCD
64
CTS
65
RTS
66
DTR
67
TXD
68
RXD
69
USB_DP
70
USB_DM
71
USB_VBUS
72
GND
73
RESERVED
74
RESERVED
75
RESERVED
76
RESERVED
77
RESERVED
78
RESERVED
79
RESERVED
80
RESERVED
81
RESERVED
82
RESERVED
83
RESERVED
84
RESERVED
85
GND
86
GND
87
GND
88
GND
89
GND
90
GND
91
GND
92
GND
93
GND
94
GND
95
GND
96
GND
97
GND
98
GND
99
GND
100
GND
101
GND
102
GND
103
GND
104
GND
105
GND
106
GND
107
GND
108
GND
109
GND
110
GND
111
GND
112
GND
113
RESERVE
114
RESERVE
115
RESERVE
116
MCLK

CLM920_NC3_LTE Module hardware manual
Shanghai Yuge Information Technology co., LTD
- 20 -
117
RESERVE
118
RESERVE
119
RESERVE
120
RESERVE
121
RESERVE
122
RESERVE
123
RESERVE
124
RESERVE
125
RESERVE
126
RESERVE
127
RESERVE
128
RESERVE
129
RESERVE
130
RESERVE
131
RESERVE
132
RESERVE
133
RESERVE
134
RESERVE
135
RESERVE
136
RESERVE
137
RESERVE
138
RESERVE
139
RESERVE
140
RESERVE
141
RESERVE
142
RESERVE
143
RESERVE
144
RESERVE
Table 3-2 IO parameter definition
Symbol sign
description
IO
Two-way input and output
PI
Power input
PO
Power Output
AI
Analog input
AO
Analog output
DI
Digital input
DO
Digital output
OD
Open drain
Table 3-3 Pin description
power supply
Pin number
Pin definition
IO
Functional description
Remarks
57
VBAT
PI
Module power input
Power supply needs to
guarantee 2A current
58
VBAT
PI
Module power input
59
VBAT
PI
Module power input