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January 22, 2026
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[BUG][STM32CubeMX 6.16.1] No pull up on UART8 single-wire.

  • January 22, 2026
  • 1 reply
  • 166 views

Pull field is not set on UART8 GPIO when configured as single-wire.

STM32H743 / STM32H753.

Nicolas_B_0-1769092064013.png

Nicolas_B_1-1769092108121.png

 

Best answer by Mahmoud Ben Romdhane

Hello @Nicolas_B 

 

Let me thank you for bringing this issue to our attention.

An internal ticket was submitted to the dedicated team (Ticket Number: 225731).

I will let you know when the issue is solved.

As Workaround, I suggest that you add GPIO_InitStruct.Pull = LL_GPIO_PULL_UP under

static void MX_UART8_Init(void):

 

Thanks.

Mahmoud

1 reply

Technical Moderator
January 22, 2026

Hello @Nicolas_B ,

Let me thank you for posting.

I am currently checking this behavior, and I will get back to you ASAP.

Thanks.

Mahmoud

 

 

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.
Technical Moderator
January 22, 2026

Hello @Nicolas_B 

 

Let me thank you for bringing this issue to our attention.

An internal ticket was submitted to the dedicated team (Ticket Number: 225731).

I will let you know when the issue is solved.

As Workaround, I suggest that you add GPIO_InitStruct.Pull = LL_GPIO_PULL_UP under

static void MX_UART8_Init(void):

 

Thanks.

Mahmoud

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.