Neoway N58 Installation manual

Hardware User Guide
Issue 1.0 Date 2019-12-16

N58 Hardware User Guide
Copyright
Copyright © Neoway Technology Co., Ltd
i
Copyright © Neoway Technology Co., Ltd 2019. All rights reserved.
No part of this document may be reproduced or transmitted in any form or by any means without prior written
consent of Neoway Technology Co., Ltd.
is the trademark of Neoway Technology Co., Ltd.
All other trademarks and trade names mentioned in this document are the property of their respective
holders.
Notice
This document provides a guide for users to use N58.
This document is intended for system engineers (SEs), development engineers, and test engineers.
THIS GUIDE PROVIDES INSTRUCTIONS FOR CUSTOMERS TO DESIGN THEIR APPLICATIONS.
PLEASE FOLLOW THE RULES AND PARAMETERS IN THIS GUIDE TO DESIGN AND COMMISSION.
NEOWAY WILL NOT TAKE ANY RESPONSIBILITY OF BODILY HURT OR ASSET LOSS CAUSED BY
IMPROPER OPERATIONS.
THE INFORMATION IN THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE DUE TO
PRODUCT VERSION UPDATE OR OTHER REASONS.
EVERY EFFORT HAS BEEN MADE IN PREPARATION OF THIS DOCUMENT TO ENSURE ACCURACY
OF THE CONTENTS, BUT ALL STATEMENTS, INFORMATION, AND RECOMMENDATIONS IN THIS
DOCUMENT DO NOT CONSTITUTE A WARRANTY OF ANY KIND, EXPRESS OR IMPLIED.
Neoway provides customers complete technical support. If you have any question, please contact your
account manager or email to the following email addresses:
[email protected]
[email protected]
Website: http://www.neoway.com

N58 Hardware User Guide
Contents
Copyright © Neoway Technology Co., Ltd
ii
Contents
About This Document ..................................................................................vii
Scope ................................................................................................................................................vii
Audience ...........................................................................................................................................vii
Change History..................................................................................................................................vii
Conventions ......................................................................................................................................vii
Related Documents..........................................................................................................................viii
1 About N58..................................................................................................9
1.1 Product Overview......................................................................................................................... 9
1.2 Block Diagram............................................................................................................................ 10
1.3 Basic Features ............................................................................................................................11
2 Module Pins.............................................................................................13
2.1 Pad Layout ................................................................................................................................. 13
2.2 Pin Description ........................................................................................................................... 14
3 Application Interfaces ..............................................................................21
3.1 Power Interface .......................................................................................................................... 21
3.1.1 VBAT.................................................................................................................................. 21
3.1.2 VDD_1P8........................................................................................................................... 24
3.2 Control Interfaces....................................................................................................................... 24
3.2.1 PWRKEY_N ...................................................................................................................... 24
3.2.2 RESET_N .......................................................................................................................... 27
3.2.3 PSM_WAKEUP ................................................................................................................. 28
3.3 Peripheral Interfaces .................................................................................................................. 28
3.3.1 USB ................................................................................................................................... 29
3.3.2 UART................................................................................................................................. 30
3.3.3 USIM.................................................................................................................................. 32
3.3.4 SDIO.................................................................................................................................. 34
3.3.5 SPI..................................................................................................................................... 36
3.3.6 I2C ..................................................................................................................................... 37
3.4 Audio Interface ........................................................................................................................... 38
3.4.1 Analog Audio Input Interfaces............................................................................................ 38
3.4.2 Analog Audio Output Interfaces......................................................................................... 40
3.5 LCD and CAM Interfaces ........................................................................................................... 41
3.5.1 LCD ................................................................................................................................... 41
3.5.2 Camera.............................................................................................................................. 42
3.6 Other Interfaces ......................................................................................................................... 42
3.6.1 ADC ................................................................................................................................... 42
3.6.2 DTR ................................................................................................................................... 43
3.6.3 NET_LIGHT....................................................................................................................... 45
3.6.4 RING.................................................................................................................................. 46
3.6.5 USB_BOOT ....................................................................................................................... 46

N58 Hardware User Guide
Contents
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3.6.6 VRTC_GPS and VRTC ..................................................................................................... 47
3.6.7 GPIO.................................................................................................................................. 48
3.6.8 GNSS Enable Interface ..................................................................................................... 49
3.6.9 Keypad interfaces.............................................................................................................. 49
3.7 RF Interface................................................................................................................................ 50
3.7.1 ANT Interface..................................................................................................................... 50
3.7.2 ANT_GNSS Interface ........................................................................................................ 52
3.7.3 ANT_BT Interface .............................................................................................................. 53
3.7.4 Antenna Assembling.......................................................................................................... 53
4 Electric Feature and Reliability ................................................................56
4.1 Electric Features ........................................................................................................................ 56
4.2 Temperature Features................................................................................................................ 57
4.3 ESD Protection........................................................................................................................... 57
5 RF Features.............................................................................................58
5.1 Operating Bands ........................................................................................................................ 58
5.2 TX Power and RX Sensitivity ..................................................................................................... 59
5.3 GNSS Features.......................................................................................................................... 59
5.4 WLAN/BT Features .................................................................................................................... 60
6 Mechanical Features ...............................................................................61
6.1 Dimensions................................................................................................................................. 61
6.2 Label........................................................................................................................................... 62
6.3 Packing....................................................................................................................................... 62
6.3.1 Reel ................................................................................................................................... 62
6.3.2 Moisture............................................................................................................................. 64
7 Mounting N58 Onto Application PCB.......................................................65
7.1 Bottom Dimensions .................................................................................................................... 65
7.2 Application Foot Print ................................................................................................................. 66
7.3 Stencil......................................................................................................................................... 66
7.4 Solder Paste............................................................................................................................... 66
7.5 SMT Furnace Temperature Curve.............................................................................................. 67
8 Safety Recommendations .......................................................................68
Conformity and Compliance ....................................................................69
A.1 Approvals ................................................................................................................................... 69
A.2 Chinese Notice........................................................................................................................... 69
A.2.1 CCC Class A Digital Device Notice ................................................................................... 69
A.2.2 Environmental Protection Notice....................................................................................... 69
A.3 EU Notice................................................................................................................................... 69
A.3.1 CE Class A Digital Device Notice...................................................................................... 69
A.3.2 Environmental Protection Notice....................................................................................... 69
BOM ........................................................................................................70
Abbreviation ............................................................................................71

N58 Hardware User Guide
Table of Figures
Copyright © Neoway Technology Co., Ltd
iv
Table of Figures
Figure 1-1 Block Diagram ................................................................................................................ 10
Figure 2-1 N58 pin definition............................................................................................................ 13
Figure 3-1 Recommended design 1................................................................................................. 22
Figure 3-2 Recommended design 2................................................................................................. 22
Figure 3-3 Recommended design 3................................................................................................. 23
Figure 3-4 Reference design of startup controlled by button........................................................... 25
Figure 3-5 Reference design of startup controlled by MCU............................................................. 25
Figure 3-6 Reference design of automatic start once powered up.................................................. 25
Figure 3-7 Startup process............................................................................................................... 26
Figure 3-8 Shutdown Process.......................................................................................................... 27
Figure 3-9 Reset controlled by button.............................................................................................. 27
Figure 3-10 Reset circuit with triode separating............................................................................... 28
Figure 3-11 N58 reset process......................................................................................................... 28
Figure 3-12 USB connection ............................................................................................................ 29
Figure 3-13 UART connection.......................................................................................................... 31
Figure 3-14 Recommended level shifting circuit 1........................................................................... 31
Figure 3-15 Recommended level shifting circuit 2........................................................................... 32
Figure 3-16 Reference design of USIM card interface..................................................................... 33
Figure 3-17 SDIO connection........................................................................................................... 35
Figure 3-18 SDIO SDR timing.......................................................................................................... 36
Figure 3-19 SPI connection.............................................................................................................. 37
Figure 3-20 SPI timing ..................................................................................................................... 37
Figure 3-21 I2C connection.............................................................................................................. 38
Figure 3-22 I2C timing...................................................................................................................... 38
Figure 3-23 Reference design 1 of differential MIC input ................................................................ 39
Figure 3-24 Schematic of differential SPK output ............................................................................ 40
Figure 3-25 Reference design of LCD interface .............................................................................. 41

N58 Hardware User Guide
Table of Figures
Copyright © Neoway Technology Co., Ltd
v
Figure 3-26 Reference design of backlight circuit............................................................................ 42
Figure 3-27 N58 LDO driving power ................................................................................................ 42
Figure 3-28 Reference design of camera ........................................................................................ 42
Figure 3-29 Process of entering sleep mode ................................................................................... 43
Figure 3-30 Incoming call service process....................................................................................... 44
Figure 3-31 Outgoing call service process....................................................................................... 44
Figure 3-32 Process of exiting from sleep mode ............................................................................. 45
Figure 3-33 Driving LED with a triode .............................................................................................. 45
Figure 3-34 Pulse wave for an incoming call ................................................................................... 46
Figure 3-35 RING indicator for SMS ................................................................................................ 46
Figure 3-36 Reference design of USB_BOOT................................................................................. 47
Figure 3-37 Reference design of VRTC and VRTC_GPS power supply......................................... 48
Figure 3-38 Keypad reference design.............................................................................................. 49
Figure 3-39 L network ...................................................................................................................... 50
Figure 3-40 Split capacitor network.................................................................................................. 50
Figure 3-41 Pi network ..................................................................................................................... 51
Figure 3-42 Recommended RF PCB design ................................................................................... 51
Figure 3-43 GNSS RF structure....................................................................................................... 52
Figure 3-44 Reference design of power supply for active antenna ................................................. 53
Figure 3-45 Specifications of MM9329-2700RA1 ............................................................................ 54
Figure 3-46 RF connections............................................................................................................. 54
Figure 3-47 Antenna layout.............................................................................................................. 55
Figure 3-48 Layout around the antenna........................................................................................... 55
Figure 6-1 N58 dimensions (Unit: mm) ............................................................................................ 61
Figure 6-2 N58 label......................................................................................................................... 62
Figure 7-1 Bottom dimensions of N58 (Unit: mm)............................................................................ 65
Figure 7-2 Recommended footprint of N58 application PCB (Unit: mm)......................................... 66
Figure 7-3 SMT furnace temperature curve..................................................................................... 67

N58 Hardware User Guide
Table of Tables
Copyright © Neoway Technology Co., Ltd
vi
Table of Tables
Table 1-1 Variant and frequency bands.............................................................................................. 9
Table 2-1 IO definition ...................................................................................................................... 14
Table 2-2 Pin Description ................................................................................................................. 14
Table 3-1 Timing parameters of SDIO interface............................................................................... 36
Table 3-2 Timing parameters of SPI interface.................................................................................. 37
Table 3-3 LCD pins........................................................................................................................... 41
Table 3-4 Camera pins ..................................................................................................................... 42
Table 4-1 Operating conditions of N58............................................................................................. 56
Table 4-2 Current consumption of N58 (Typical).............................................................................. 56
Table 4-3 Temperature feature of N58 ............................................................................................. 57
Table 4-4 N58 ESD protection.......................................................................................................... 57
Table 5-1 Operating Bands of N58................................................................................................... 58
Table 5-2 RF transmit power and RX sensitivity of N58................................................................... 59
Table 5-3 GNSS Feature.................................................................................................................. 59
Table 5-4 WLAN/BT TX power and RX sensitivity ........................................................................... 60

N58 Hardware User Guide
About This Document
Copyright © Neoway Technology Co., Ltd
vii
About This Document
Scope
This document is applicable to N58 series.
It defines the features, indicators, and test standards of the N58 module and provides a reference for
the hardware design of each interface.
Audience
This document is intended for system engineers (SEs), development engineers, and test engineers.
Change History
Issue
Date
Change
Changed By
1.0
2019-12
Initial draft
Zhang Gang
Conventions
Symbol
Indication
This warning symbol means danger. You are in a situation that could cause fatal
device damage or even bodily damage.
Means reader be careful. In this situation, you might perform an action that could
result in module or product damages.
Means note or tips for readers to use the module

N58 Hardware User Guide
About This Document
Copyright © Neoway Technology Co., Ltd
viii
Related Documents
Neoway_N58_Datasheet
Neoway_N58_Product_Specifications
Neoway_N58_AT_Command_Mannual
Neoway_N58_EVK_User_Guide

N58 Hardware User Guide
Chapter 1 About N58
Copyright © Neoway Technology Co., Ltd
9
1 About N58
N58 is an industrial 4G module that is developed on Spectrum chipset. Its dimensions are 30 x 28 mm
x 2.6 mm. This high-performance data transmission module supports GSM, FDD LTE, TDD LTE (Cat
1) network modes, provides various hardware interfaces, supports audio and video functions and BT
connectivity, and optionally supports GNSS. This module is easy for customers to develop applications
and applicable to different scenarios.
⚫ARM Cortex- A5 processors, 500MHz main frequency, 32B L1 cache
⚫Supports network modes: GSM/GPRS&& LTE Cat1
⚫Supports USB2.0, USIM, ADC, UART, SDIO, SPI, I2C, and GNSS (optional)
1.1 Product Overview
N58 series include multiple variants. The following table lists the variants and frequency bands
supported.
Table 1-1 Variant and frequency bands
Function
Version
Category
Band
GNSS
CODEC
N58
CN
Cat1
LTE FDD: B1, B3, B5, B8,
LTE TDD: B38, B39, B40, B41
GSM/GPRS: 850/900/1800/1900 MHz
Supported
Yes
N58
EA
Cat1
LTE FDD: B1, B3, B5, B7, B8, B20, B28
LTE TDD: B38, B39, B40, B41
GSM/GPRS: 850/900/1800/1900 MHz
Supported
Yes
N58 adopts 192-pin LGA + LCC package and its dimensions are 30 mm x 28 mm x 2.6mm. With
industrial-grade performance, it is well applicable to electrical terminals, PoC terminals, POS, and other
IoT terminals.

N58 Hardware User Guide
Chapter 1 About N58
Copyright © Neoway Technology Co., Ltd
10
1.2 Block Diagram
N58 consists of the following functionality units:
⚫Baseband
⚫26MHz crystal oscillator
⚫Power management unit
⚫RF section
⚫Digital interfaces (USIM, I2C, ADC, UART, USB, SDIO)
Figure 1-1 Block Diagram

N58 Hardware User Guide
Chapter 1 About N58
Copyright © Neoway Technology Co., Ltd
11
1.3 Basic Features
Parameter
Description
Physical features
⚫Dimensions: (30.0±0.15) mm ×(28.0±0.15) mm ×(2.6±0.2) mm
⚫Package: LGA + LCC
⚫Weight: TBD
Temperature ranges
Operating: -30°C to +75°C
Extended: -35°C to +85°C
Storage: -40°C to +90°C
Operating voltage
VBAT: 3.4V to 4.2V, TYP: 3.8V
Current
Sleep: < TBD
Idle: < TBD
Operating current: TBD
MIPS processor
ARM Cortex- A5 processors, 500MHz main frequency, 32 kB L1 cache
Memory
RAM: 128Mb
ROM: 64Mb
Band
See Table 1-1.
Wireless rate
GPRS: Max 85.6 Kbit/s(DL) / Max 85.6 Kbit/s(UL)
FDD-LTE: Cat1, Max 10 Mbps(DL)/Max 5Mbps(UL)
TDD-LTE: Cat1, Max 8.96Mbps(DL)/Max 2Mbps(UL)
Transmit power
GSM850: +33dBm (Power Class 4)
EGSM900: +33dBm (Power Class 4)
DCS1800: +30dBm (Power Class 1)
PCS1900: +30dBm (Power Class 1)
LTE: +23dBm (Power Class 3)
Application Interfaces
2G/4G antenna, GNSS antenna, BT RX antenna, 50Ω characteristic
impedance
Three UART interfaces, at most 2 Mbit/s
Two USIM interfaces, 1.8V/3V adaptive
One USB2.0 high-speed interface
One 12-bit ADC interface, detectable voltage ranging from 0.1 to 1.7V.
One SDIO interface, used for SD card
One 1PPS interface
One I2C interface, host mode only
AT commands
3GPP Release 13
Neoway extended commands
SMS
PDU, TXT

N58 Hardware User Guide
Chapter 1 About N58
Copyright © Neoway Technology Co., Ltd
12
Data
PPP, RNDIS, ECM
Protocol
TCP, UDP, MQTT, FTP/FTPS, HTTP/HTTP(S), SSL, TLS
Certification approval
CCC, SRRC, RoSH, CE
* indicates functions that will be supported in the future.

N58 Hardware User Guide
Chapter 2 Module Pins
Copyright © Neoway Technology Co., Ltd
13
2 Module Pins
There are 192 pins on N58 and their pads are introduced in LGA + LCC package.
2.1 Pad Layout
Figure 2-1 shows the pad layout of N58.
Figure 2-1 N58 pin definition

N58 Hardware User Guide
Chapter 2 Module Pins
Copyright © Neoway Technology Co., Ltd
14
2.2 Pin Description
Table 2-1 lists the definition of IO types.
Table 2-1 IO definition
IO Type
B
Digital input/output, COMS logic level
DO
Digital output, COMS logic level
DI
Digital input, COMS logic level
PO
Power output
PI
Power supply input
AO
Analog output
AI
Analog input
Level Feature
P1
1.8V/2.85V
1.8V level feature:
VIH=1.26V~2.1V
VIL=-0.3V~0.36V
VOH=1.44V~1.8V
VOL=0V~0.4V
2.85V level feature
VIH=2V~3.15V
VIL=-0.3V~0.57V
VOH=2.28V~2.85V
VOL=0V~0.4V
P3
1.8V digital IO
VIH min=1.2V
VIL max= 0.3V
VOH min=1.35V
VOLmax=0.45V
P6
Voltage type of USB2.0 data interfaces
Vmin=2.97V
Vmax=3.5V
Vtyp=3.08V
Table 2-2 Pin Description
Signal
Pin
I/O
Function
Level
Feature
Remarks
Power interface
VBAT
27, 28, 29
PI
Main power
supply input
Vmax=4.2V
Supply at most 2A current
VDD_1P8
45
PO
1.8V power
output
Vnorm=1.8V
Imax=50 mA
Used only for level shifting
and IO power supply.
Leave this pin floating if it

N58 Hardware User Guide
Chapter 2 Module Pins
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15
is not used.
GND
1, 14, 17, 20, 26, 30, 31, 44, 49, 74, 75, 77, 91, 93,
95, 97-102, 104, 106, 112, 114, 115, 121-123, 128,
129, 137, 142, 143, 146, 147, 155-192
Ensure that all GND pins
are connected to the
ground.
Control Interfaces
RESET_N
32
DI
Module reset
input
P3
Triggered by a low level to
reset the module.
PWRKEY_N
33
DI
ON/OFF button
P6
3.3V high level by default,
triggered by a low level to
control the startup of the
module.
PSM_WAKEUP
79
DI
Low power
consumption
mode
P3
Triggered by a high level
to enable the sleep mode
of the module.
Leave this pin floating if it
is not used
UART1 interface
UART1_TX
69
DO
Data transmitting
P3
Used for data
transmission. It outputs
logs during startup. Leave
this pin floating if it is not
used.
UART1_RX
70
DI
Data receiving
Used for data receiving. It
outputs logs during
startup Leave this pin
floating if it is not used.
UART1_CTS
71
DI
Clear to send
P3
Leave this pin floating if it
is not used.
UART1_RTS
72
DO
Request to send
P3
Leave this pin floating if it
is not used.
UART2 port
UART2_TX
46
DO
Data transmitting
P3
Used for data
transmission and module
commissioning. Leave
this pin floating if it is not
used.
UART2_RX
47
DI
Data receiving
P3
Used for data
transmission and module
commissioning. Leave
this pin floating if it is not

N58 Hardware User Guide
Chapter 2 Module Pins
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used.
UART2_CTS
51
DI
Clear to send
P3
Leave this pin floating if it
is not used.
UART2_RTS
52
DO
Request to send
P3
Leave this pin floating if it
is not used.
UART3 Interface
UART3_RX
11
DI
Data receiving
P3
Used for data
transmission and AP
debug. Leave this pin
floating if it is not used.
UART3_TX
12
DO
Data transmitting
P3
Used for data
transmission and AP
debug. Leave this pin
floating if it is not used.
USIM1 interface
USIM1_VCC
35
PO
USIM1 power
output
USIM1_DATA
36
DIO
USIM data IO
P1
It should be connected to
USIM1_VCC through a 10
kΩ pull-up resistor.
USIM1_CLK
37
DO
USIM1 clock
output
P1
USIM1_RESET
38
DO
USIM1 reset
P1
USIM1_DET
39
DI
USIM1 detect
P1
USIM2 Interface
USIM2_VCC
21
PO
USIM1 power
output
USIM2_DATA
22
DIO
USIM data IO
P1
It should be connected to
USIM1_VCC through a 10
kΩ pull-up resistor.
USIM2_CLK
23
DO
USIM1 clock
output
P1
USIM2_RESET
24
DO
USIM1 reset
P1
USIM2_DET
25
DI
USIM1 detect
P1
USB interface
USB_VBUS
40
PI
Charging voltage
check
3.4V to
5.2V, TYP:
5V
Route DM and DP signals
in differential mode,
control impedance of 90Ω

N58 Hardware User Guide
Chapter 2 Module Pins
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USB_DM
41
IO
USB data
negative signal
P6
Leave this pin floating if it
is not used.
USB_DP
42
IO
USB data
positive signal
P6
USB_ID
43
DI
OTG detect
P3
Leave this pin floating if it
is not used.
ADC interface
ADC1
88
AI
Analog-to-digital
signal
conversion
Vmax=1.7V;
Vmin=0.1V
12-bit, detectable voltage
ranging from 0.1V to 1.7V
Leave this pin floating if it
is not used.
I2C interface
I2C_SDA
81
B
I2C data
P3
Connect it to a 2.2 kΩ pull-
up resistor. It works at a
power domain of 1.8V.
I2C_SCL
82
DO
I2C clock
P3
Connect it to a 2.2 kΩ pull-
up resistor. It works at a
power domain of 1.8V.
LCD Interfaces
LCD_RST_N
63
IO
Reset Control
P3
LCD_TE
64
IO
Tearing effect
input to
synchronize
MCU to frame
writing, activated
by S/W
command
P3
LCD_SPI_CS
65
IO
SPI chip select
P3
LCD_SPI_CLK
66
DO
SPI clock
P3
LCD_SPI_SDC
67
IO
Data or
command signal
P3
LCD_SPI_SIO
68
IO
Data input/output
P3
LCD_SPI_SEL
73
IO
Select signal
P3
VDD_LCD
138
PO
1.8V DC power
supply
P3
Max current: 200mA
LED_K0
139
PI
RGB LED input
minus
LED_K1
140
PI
RGB LED input

N58 Hardware User Guide
Chapter 2 Module Pins
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minus
LED_K2
141
PI
RGB LED input
minus
CAM Interface
VDD_CAM
53
PO
1.8V power
output
P3
Max 100mA
CAM_RST_N
54
IO
Reset signal
P3
Reset signal triggered by
low level
CAM_SPI_DATA0
55
DI
Data signal input
P3
CAM_SPI_DATA1
56
DI
Data signal input
P3
CAM_SPI_CLK
57
DO
SPI clock
P3
CAM_I2C_SDA
58
B
I2C data
P3
CAM_I2C_SCL
59
DO
I2C clock
P3
CAM_PWDN
60
DO
Power down
control
P3
CAM_MCLK
61
IO
Clock signal
P3
AVDD_CAM
62
AO
1.8V power
supply for
autofocus motor
P3
SDIO Interface
SDC_PWR_EN
2
IO
Control of SD
power
P3
Leave this pin floating if it
is not used.
SDC2_DATA_2
3
B
SDIO data bit 2
P3
Leave this pin floating if it
is not used.
SDC2_DATA_3
4
B
SDIO data bit 3
P3
Leave this pin floating if it
is not used.
SDC2_CMD
5
B
SDIO command
P3
Leave this pin floating if it
is not used.
SDC2_CLK
6
DO
SDIO clock
P3
Leave this pin floating if it
is not used.
SDC2_DATA_0
7
B
SDIO data bit 0
P3
Leave this pin floating if it
is not used.
SDC2_DATA_1
8
B
SDIO data bit 1
P3
Leave this pin floating if it
is not used.
SDC_DET
96
IO
SDC detect
Leave this pin floating if it
is not used.
VDD_SDCPULL
103
PO
1.8V power
Max current: 150mA

N58 Hardware User Guide
Chapter 2 Module Pins
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19
supply for SD
SPI interface
SPI_CLK
84
DO
Clock signal
P3
Leave this pin floating if it
is not used.
SPI_MISO
85
DI
Device output,
host input
P3
Leave this pin floating if it
is not used.
SPI_MOSI
86
DO
Device input,
host output
P3
Leave this pin floating if it
is not used.
SPI_CS_N
87
DO
Chip select
P3
Leave this pin floating if it
is not used.
GPIO
GPIO_0
50
B
GPIO
P3
Leave this pin floating if it
is not used.
GPIO_2
83
B
GPIO
P3
Leave this pin floating if it
is not used.
GPIO_3
13
B
GPIO
P3
Leave this pin floating if it
is not used.
Audio SPK
interface
SPK_P
15
AO
SPK signal plus
SPK_N
16
AO
SPK signal
minus
Audio MIC
interface
MIC_P
18
AI
MIC signal plus
MIC_N
19
AI
MIC signal minus
Antenna Interface
ANT
76
Main antenna
50 Ω impedance for traces
ANT_GNSS
92
GNSS antenna
50 Ω impedance for traces
ANT_BT
94
BT antenna
50 Ω impedance for traces
Other Interface
GNSS_LNA_EN
90
DO
GNSS LNA
enable
P3
Leave this pin floating if it
is not used.
VRTC_GPS
105
RTC power
supply, 1.5V to -
3.6V, typical
value 3.0V
It can be connected to a
cell battery or
supercapacitor and
provides a power source