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ADC STM32H745

poeticbugbear
Visitor

Hello team,

I am using adc pins to detect voltage. In cube IDE I do adjustment to get ADC clock as 75MHz. But in the datasheet it is mentioned that for that package max adc clock is 50Mhz. Still cubeIDE(in .ioc file) does not shows any error and compiles the program. So currently adc is running at 75Mhz/50Mhz? Also refer the configurations below

Controller- STM32H745 LQFP144

ADC- 16 bits, trigger by timer4forum1.jpgforum2.jpg

1 ACCEPTED SOLUTION

Accepted Solutions
STTwo-32
ST Employee

Hello @poeticbugbear and welcome to the ST Community .

For the CubeMX ADC configuration, the maximum allowed frequency depends on the VOS selection. You can find the max frequency on the table 62 of the RM0399:

Screenshot_2024-10-09-06-16-24-26_f541918c7893c52dbd1ee5d319333948.jpg

So, it may have of frequency of 160MHz with VOS1 or VOS0.

For the recommandations on the application note, those are recommandations to have an ADC transfer function with no missing codes.

Best Regards.

STTwo-32 

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.

View solution in original post

1 REPLY 1
STTwo-32
ST Employee

Hello @poeticbugbear and welcome to the ST Community .

For the CubeMX ADC configuration, the maximum allowed frequency depends on the VOS selection. You can find the max frequency on the table 62 of the RM0399:

Screenshot_2024-10-09-06-16-24-26_f541918c7893c52dbd1ee5d319333948.jpg

So, it may have of frequency of 160MHz with VOS1 or VOS0.

For the recommandations on the application note, those are recommandations to have an ADC transfer function with no missing codes.

Best Regards.

STTwo-32 

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.