STM32U0 reference manual inconsistent? (exti lines and nvic)

christian-enderle · ‎2024-11-21

Hello together,

I'm a little bit confused by the NVIC and EXTI description in the RM0503.

The NVIC vector table says the RTC / TAMP interrupts are combined EXTI lines 19 & 21 (on page 302).

But when looking at the EXTI line connections table (on page 309) the RTC source is on line 28 and TAMP on line 29.

AA1 · ‎2024-11-21

This is already reported here with other issues: Missing section IRTIM in STM32U0 RM and more.

View solution in original post

Andrew Neil · ‎2024-11-21

Indeed:

https://www.st.com/content/ccc/resource/technical/document/reference_manual/group0/a8/d3/dc/a5/98/12/49/a9/DM00908031/files/DM00908031.pdf/jcr:content/translations/en.DM00908031.pdf#page=302

A complex system that works is invariably found to have evolved from a simple system that worked.
A complex system designed from scratch never works and cannot be patched up to make it work.

AA1 · ‎2024-11-21

This is already reported here with other issues: Missing section IRTIM in STM32U0 RM and more.

STTwo-32 · ‎2024-11-21

Hello @christian-enderle

Thank you so much for reporting this typo. I will escalate it for correction on the comming releases of the doc.

@AA1 i will be back and take a deep look to your comments and escalate all typos. Thank you so much for your contribution.

Best Regards.

STTwo-32

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Andrew Neil · ‎2024-11-22

@AA1 wrote:
already reported here with other issues: Missing section IRTIM in STM32U0 RM and more.

Specifically, this post within that thread:

https://community.st.com/t5/stm32-mcus-products/missing-section-irtim-in-stm32u0-rm-and-more/m-p/677811/highlight/true#M250407

A complex system that works is invariably found to have evolved from a simple system that worked.
A complex system designed from scratch never works and cannot be patched up to make it work.