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stm32R7VI widebus

Question asked by semler.miloslav on Mar 24, 2018
Latest reply on Apr 8, 2018 by semler.miloslav

I met an interesting problem. When I tried to configure this IO with SD widebus config (4bit) with hal libraries I always failed with initialization because pin 1 of SD card is on logic 0.

The solution was firstly let it initialize with pin 1 of SD card as GPIO with logic high as sdmmc core has logic 0 on this pin if it is configured as alternate function and before widebus initialization switch to alternate function.

So it is bug or feature of 4bit mode?

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