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ebrombaugh1
Associate III
March 28, 2026
Question

CubeMX2: SPI/I2S UI allows enabling MCLK output even when no pins are available.

  • March 28, 2026
  • 2 replies
  • 289 views

On the STM32C542CC in LQFP48, none of the Port C pins that support I2S MCLK output are available. Despite this, enabling the "Master Clock Output" under "Advanced Features" in the MX2 Peripherals tab is still possible and reports no warnings or errors.

2 replies

ST Technical Moderator
March 30, 2026

Hello @ebrombaugh1 

Thank you for bringing this issue to our attention.

The issue is fixed internally and will be available in the next release.

In order to give better visibility on the answered topics, please click on 'Best answer' on the reply which solved your issue or answered your question. Saket_Om
ST Technical Moderator
July 2, 2026

Hello ​@ebrombaugh1 

Just to keep you informed that issue is not yet fixed and it is tracked internally with number CDM0064034. We will keep you informed once fix is available.

In order to give better visibility on the answered topics, please click on 'Best answer' on the reply which solved your issue or answered your question. Saket_Om