STM32H523CET and I2S: How to activate master clock output and external clock input?

[jmarino]

Hi, everyone.

I'm trying to configure I2S in a STM32H523CET. I'd like to activate MCLK signal, but I can't find how.

I'd also like activate external clock input for I2s (AUDIOCLK signal). The CubeMX says:

"Audio Clock Input is not available.

To enable it, one of the following RCC Mode(s) or IP(s) have to be configured from the Pinout TAb:

-EnableExtClockForSAI1"

But again, I can't find where to activate that.

[jmarino · Accepted solution]

Finally found the solution: 48pin packages don't have pins for AUDIOCLK or I2Sx_MCK.