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July 24, 2026
Question

Why can't I see the SFRs for my STM32C551RCT6?

  • July 24, 2026
  • 0 replies
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I'm in debug mode in STM32CubeIDE.

On the SFRs tab in the upper right corner, I want to enable UART4 and check the register status.

But I only see UART-related items: LPUART/USART1/USART2/USART3.

Why can't I find UART4?

My MCU is an STM32C551RCT6.

I'm very certain this IC has UART4