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lxiao.2
lxiao.2
Visitor II
September 10, 2021
Solved

H750 ADC cannot be set to synchronous clock mode when AHB clock is 100MHz. the constraint seem to be wrong? why?

  • September 10, 2021
  • 1 reply
  • 1263 views

The cubemx cannot configure the ADC synchronous clock mode when the system clock is 400MHz,But use 200MHz or 480MHz is OK, why? my cubemx Version is 6.3.0

0693W00000Dmkc4QAB.png0693W00000DmkbpQAB.png0693W00000DmkgBQAR.pngthis is my ioc file

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Best answer by TDK

Can't quite figure it out, but the answer is almost certainly related to max ADC clock in VOS1 mode on rev Y.

Moving to 480 MHz puts you in VOS0, and moving to 200 MHz obviously lowers your clock speed by half.

Similar:

https://community.st.com/s/question/0D73W000001M9mb/detail?s1oid=00Db0000000YtG6&s1nid=0DB0X000000DYbd&emkind=chatterCommentNotification&s1uid=0050X000007vmts&emtm=1631183027563&fromEmail=1&s1ext=0

1 reply

TDK
TDKBest answer
September 10, 2021

Can't quite figure it out, but the answer is almost certainly related to max ADC clock in VOS1 mode on rev Y.

Moving to 480 MHz puts you in VOS0, and moving to 200 MHz obviously lowers your clock speed by half.

Similar:

https://community.st.com/s/question/0D73W000001M9mb/detail?s1oid=00Db0000000YtG6&s1nid=0DB0X000000DYbd&emkind=chatterCommentNotification&s1uid=0050X000007vmts&emtm=1631183027563&fromEmail=1&s1ext=0

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