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Different pins for SPI1 in NUCLEO-STM32F401 and the STM32F401RE MCU

Question asked by Dimitris Paraskevopoulos on Dec 12, 2014
Latest reply on Dec 12, 2014 by waclawek.jan
Hi all,

I am new to this STM32 chip and I was checking out the datasheets and the CubeMX tool and I noticed something weird.

MCU datasheet page 42

Nucleo Datasheet page 40

In the MCU datasheet CS for SPI1 is PA4 while in the Nucleo CS or NSS for SPI1 is PB6.
What is the reason for this change? What is the pin that I should use when trying out the SPI1?
Also when trying the CubeMX it also displayed the NSS chip select as PA4 instead of PB6.