How to locate the PD8 and PD9 port pins on the nucleo 144 STM32F429ZI for external USART3 interfacing with the TTl to RS485 converter. A brief explanation of the config of the SB (solder bridges) connections will be nice or where to get more information.

[gbm]

Just have look at the board's manual - you will find all the connectors and config options there.

[KAche.1]

I am actually new to stm32 and perhaps there is

something am missing. The user manual says UART3 is linked to PD8 and PD9 but on the extension connectors diagram, I cant find PD8 and PD9.

[Pavel A. · Accepted solution]

The Nucleo has two rows of holes on each side. There you'll find the pins not routed to the black connectors.

[KAche.1]

Got it thanks