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Nucleo-h745ziq spi 1 and spi 3 MOSI pin mapping issue.

MDeva.1
Associate II

‎2021-06-20 09:37 PM

Hello ,

I am using NUCLEO-H745ziq board. I am trying to loopbacking. SPI1 and SPI3 i am using. SPI1 as full duplex slave and SPI3 as full duplex master.Both operating on 25MHZ.

But i have issue with is MOSI pin.Because PB5 is assigned to both. But when I tried to use another alternate pins for I did not get ouput. So which pin I have to use for MOSI.0693W00000BbUhNQAV.png0693W00000BbUhcQAF.png

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TDK
Guru

‎2021-06-21 07:19 AM

The datasheet and STM32CubeMX will list possible pins for a given function.

In this case, PB2, PC12, PD6, and PB5 can be chosen for SPI3_MOSI. Choose one that isn't being used for anything else and is available on your device.

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