[STM32F746-Discovery] Is it OK to use analog pins for UART7?

[Ivan Ivan]

Posted on June 23, 2017 at 13:34

Hello. I'm having problem with USART6 (again). So I'm testing now UART7. By checking documentation I have found that it is theoretically possible to set up uart7 on analog pins. I have made such conclusion after looking at p.21 of Discovery User Manual and by looking of p.76 of MCU User Manual:

MCU PINDISCOVERY CONTACT

PF10 : GPIO candidate (useful!)A1

PF9 : UART7CTSA2

PF8 : UART7RTSA3

PF7 : UART7TXA4

PF6 : UART7RXA5

I'm confused because contacts A1-A5 are marked as analog and they are hooked to Alternative Functions related to Analog-to-Digital-Converter (in Discovery User Manual). (I'm new with electronics and I'm afraid to damage the Board)

UART7 requires digital signals, I suppose.

Is it OK to use these Discovery contacts for UART7?

#stm32f746-discovery #uart #usart6

[S.Ma · Accepted solution]

Posted on June 23, 2017 at 13:45

In microcontrollers, an 'analog pin' means Digital IO pin with additional analog capability (usually ADC analog to digital converter), so yes, these pins can be used for UART.