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Information missing in reference manual for register clearing interrupt status on G431

Tobe
Senior III

There is not information, on how to clear the flag (1 or 0), on register TIMx_SR (x=1,8,20).

I believe there were also other registers where it was not mentioned, how to clear them.

1 ACCEPTED SOLUTION

Accepted Solutions

rc_w0 means you write zero to the bit to clear it, ie TIM->SR= 0xFFFFFFFE; clears UIF

g4_tim_sr.jpg

"read/clear write0 (rc_w0) Software can read as well as clear this bit by writing 0. Writing 1 has no
effect on the bit value."

https://www.st.com/resource/en/reference_manual/rm0440-stm32g4-series-advanced-armbased-32bit-mcus-stmicroelectronics.pdf

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View solution in original post

2 REPLIES 2

rc_w0 means you write zero to the bit to clear it, ie TIM->SR= 0xFFFFFFFE; clears UIF

g4_tim_sr.jpg

"read/clear write0 (rc_w0) Software can read as well as clear this bit by writing 0. Writing 1 has no
effect on the bit value."

https://www.st.com/resource/en/reference_manual/rm0440-stm32g4-series-advanced-armbased-32bit-mcus-stmicroelectronics.pdf

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Up vote any posts that you find helpful, it shows what's working..

Page 73 says it all.

 

Thats a bit embarrasing :grinning_face_with_sweat: