WF-M620-RSD2
IEEE 802.11a/b/g/n 1T1R IoT Module
Sichuan AI-Link Technology Co., Ltd. page 7 of 16
Note：
1.ISU is a serial communication block which can be configured as I2C master. I2C slave, SPI master, SPI slave, or
UART; I2C runs at up to 1MHz, SPI at up to 40MHz, and UARTs at up to 3Mbps.
2.The MT3620AN ADC VREF maximum is 2.5V.Should not input >2.5V when using the ADC because the ADC will not
read any value higher than 2.5V.If the ADC pin is not configured for ADC operation,then 3.3V input is ok.
3.WF-M620-RSD2 RTC functionality is enabled, the AVDD_3V3_RTC must be always powered, or the MT3620 will
hang up during the system boot procedure.
4.The power supply for all GPIO pins is 3.3V.
GPIO multiplexed with I2S 0
GPIO multiplexed with I2S 0
GPIO multiplexed with I2S 0
GPIO multiplexed with I2S 0
GPIO multiplexed with I2S 0
GPIO multiplexed with ISU3 functions(SPI CLK/UART TX)
GPIO multiplexed with ISU3 functions(SPI MOSI/UART RTS/I2C CLK)
GPIO multiplexed with ISU3 functions(SPI MISO/UART RX/I2C DATA)
GPIO multiplexed with ISU3 functions(SPI CSA/UART CTS)
GPIO multiplexed with ISU3 functions(SPI CSB)
GPIO multiplexed with ISU4 functions(SPI MOSI/UART RTS/I2C CLK)
GPIO multiplexed with ISU4 functions(SPI MISO/UART RX/I2C DATA)
Azure Sphere Service UART TXD
Service UART is the main interface
for PC to communicate with the
Azure Sphere OS.Core A7 app
debugging, sideload, manufacturing
test, getting device ID operation all
use the Service UART port.
Azure Sphere Service UART RTS
Azure Sphere Service UART RXD
Azure Sphere Service UART CTS
Azure Sphere flash re-imaging Recovery UART RXD
Recovery UART is
for upgrading the
Azure Sphere OS
without connection
to the Internet.
Azure Sphere flash re-imaging Recovery UART TXD
Azure Sphere flash re-imaging Recovery UART RTS
Azure Sphere flash re-imaging Recovery UART CTS
Dedicated GPIO multiplexed with UART for I/O CM4F 0
Dedicated GPIO multiplexed with UART for I/O CM4F 0
