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

ebrombaugh1 · ‎2026-03-27

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.

Saket_Om · ‎2026-03-30

Hello @ebrombaugh1

Thank you for bringing this issue to our attention.

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

To give better visibility on the answered topics, please click on "Accept as Solution" on the reply which solved your issue or answered your question.
Saket_Om

View solution in original post

Saket_Om · ‎2026-03-30

Hello @ebrombaugh1

Thank you for bringing this issue to our attention.

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

To give better visibility on the answered topics, please click on "Accept as Solution" on the reply which solved your issue or answered your question.
Saket_Om