Maple pinout
On/off
Remap
USART1
RX
TX
CTS
RTS
CK
USART2
RX
TX
CTS
RTS
CK
USART3
RX
TX
CTS
RTS
CK
UART4
RX
TX
UART5
RX
TX
SPI1
SCK
MISO
MOSI
SS
SPI2
SCK
MISO
MOSI
SS
I2C1
SCL
SDA
SMBAI
I2C2
SCL
SDA
SMBAI
I2S2
WS
CK
SD
MCK
I2S3
WS
CK
SD
MCK
Main
Default
Alternative
Remark