Installation Instructions

WF-M620-RSC1
IEEE 802.11b/g/n 1T1R IoT Module
Sichuan AI-Link Technology Co., Ltd. page 6 of 13
Pin
Symbol
Type
Description
1
GPIO41_ADC0/GPIO4_PWM4
AI/DIO
Configured as GPIO or ADC input or PWM output
2
GPIO42_ADC1/GPIO5_PWM5
AI/DIO
Configured as GPIO or ADC input or PWM output
3
GPIO43_ADC2/GPIO6_PWM6
AI/DIO
Configured as GPIO or ADC input or PWM output
4
GPIO44_ADC3/GPIO7_PWM7
AI/DIO
Configured as GPIO or ADC input or PWM output
5
GPIO26_SCLK0_TXD0/GPIO8
_PWM8
DIO
Configured as GPIO or ISU0 SPI CLK or UART0 TX or PWM
output
6
GPIO27_MOSI0_RTS0_SCL0/
GPIO9_PWM9
DIO
Configured as GPIO or ISU0 SPI MOSI or UART0 RTS or I2C0
CLK or PWM output
7
GPIO28_MISO0_RXD0_SDA0
/GPIO10_PWM10
DIO
Configured as GPIO or ISU0 SPI MISO or UART0 RX or I2C0
DATA or PWM output
8
GPIO29_CSA0_CTS0/GPIO11
_PWM11
DIO
Configured as GPIO or ISU0 SPI CSA or UART0 CTS or PWM
output
9
GPIO30_CSB0
DIO
Configured as GPIO or ISU0 SPI CSB
10
GPIO32_MOSI1_RTS1_SCL1
DIO
Configured as GPIO or ISU1 SPI MOSI or UART1 RTS or I2C1
CLK
11
GPIO34_CSA1_CTS1
DIO
Configured as GPIO or ISU1 SPI CSA or UART1 CTS
12,13
GND
G
Ground
27
36,37
14
GPIO31_SCLK1_TXD1
DIO
Configured as GPIO or ISU1 SPI CLK or UART1 TX
15
GPIO33_MISO1_RXD1_SDA1
DIO
Configured as GPIO or ISU1 SPI MISO or UART1 RX or I2C1
DATA
16
GPIO35_CSB1
DIO
Configured as GPIO or ISU1 SPI CSB
17
RECOVERY_CTS
DI
Azure Sphere flash re-imaging Recovery UART CTS
18
RECOVERY_RTS
DO
Azure Sphere flash re-imaging Recovery UART RTS
19
RECOVERY_TXD
DO
Azure Sphere flash re-imaging Recovery UART TXD
20
RECOVERY_RXD
DI
Azure Sphere flash re-imaging Recovery UART RXD
21
SWO
DO
ARM SWO debug output
For IO CM4F cores only; a
single SWD channel is shared
between them.
22
SWD_CLK
DI
ARM SWD clock
23
SWD_DIO
DIO
ARM SWD debug output
24
DEBUG_RTS
DO
Azure Sphere OS debug RTS/Strapping pin when MT3620 boot
up
25
DEBUG_TXD
DO
Azure Sphere OS debug TXD
26
3V3
P
DC 3.3V Power Supply
28
3V3_RTC
P
DC 3.3V for real-time clock
29
EXT_PMU_EN
DO
Enable/disable external PMU when in deep sleep mode (RTC
mode)
30
WAKEUP
DI
Wake from deep sleep (RTC mode)
31
SYSRST_N
DI
System reset
32
SERVICE_TXD
DO
Azure Sphere Service UART TXD
The Azure Sphere Service
UART supports provisioning,
app updates, manufacturing
test and in-field debugging.
33
SERVICE_RTS
DO
Azure Sphere Service UART RTS
34
SERVICE_RXD
DI
Azure Sphere Service UART RXD
35
SERVICE_CTS
DI
Azure Sphere Service UART CTS