User's Manual

Wi-linktech Communication Technologies (Shanghai) Co.,Ltd.
 SPI
 P
D < 7 > : SPI_CK
 PB < 6 > : SPI_DI
 PB < 7 > : SPI_DO
 PD < 2 > : SPI_CS
 I2C
 PC < 0 >: I2C_SDA
 PC < 1 >: I2C_SCK
 PC < 2 >: I2C_SDA
 PC < 3 >: I2C_SCK
I2C can also be multiplexed by SPI interface, that is, I2C_SDA/I2C_SCK can be
multiplexed by SPI_DI /SPI_CK respectively.
 UART interface
 PA < 0 > : UART_RX
 PB < 1 > : UART_TX
 PB < 7 > : UART_RX
 PC < 3 > : UART_RX
 UART hardware flow control interface
 PA < 7 > : UART_RTS
 PB < 6 > : UART_RTS
 PC < 0 > : UART_RTS
 PC < 4 > : UART_CTS
 Single-wire debugging interface
 PA < 7 > : SWS
 PD < 4 > : SWM
4.3 UART interface
The module supports UART (universal asynchronous transceiver) and realizes full duplex
transmission and reception through TX and RX interfaces. Support hardware flow control RTS
and CTS.
Fi
gure 4-2 UART communication
2019.03
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