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nicolas
nicolas
Senior II
Jul 10, 2025 9:45 AM UTC
Solved

LPUART_ RTOR ?

In the RM0456, the LPUART has a block diagram (67.4.1) with a register called LPUART_ RTOR but there is no documentation about this register. For USART, this register is related to Receiver timeout interrupt but this feature is not available for LPUART.

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KDJEM.1
KDJEM.1Best answer
ST Technical Moderator
Jul 10, 2025 10:00 AM UTC

Hello @nicolas ;

 

Thank you for bringing this issue to our attention.

I reported internally for checking.

Internal ticket number: 213876 (This is an internal tracking number and is not accessible or usable by customers).

 

Thank you.

Kaouthar

To give better visibility on the answered topics, please click on "Best answer" on the reply which solved your issue or answered your question.
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2 replies

KDJEM.1
KDJEM.1Best answer
ST Technical Moderator
Jul 10, 2025 10:00 AM UTC

Hello @nicolas ;

 

Thank you for bringing this issue to our attention.

I reported internally for checking.

Internal ticket number: 213876 (This is an internal tracking number and is not accessible or usable by customers).

 

Thank you.

Kaouthar

To give better visibility on the answered topics, please click on "Best answer" on the reply which solved your issue or answered your question.
Guenael Cadier
Guenael Cadier
ST Employee
Jul 10, 2025 10:04 AM UTC

Hi @nicolas 
I confirm Receiver Timeout feature is not supported on LPUART instance on U5, as stated in 67.3, making the RTOR register not relevant for LPUART.

GuenaelCadier_0-1752141714640.png

Even if register might be present in peripheral, it cannot be used.

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