STM32L496QGI6P with different production "Date code" behave different. --> Solved

[aritec]

Hi,

I developed a firmware for STM32L496QGI6P and all went well. After some time we produced new devices and there we discovered a problem with the ADC. The only different with the new hardware was the "date code" of the STM32L496.

With date code 749 I started a ADC as:

1. Enable ADC
2. Set previous stored calibration values
3. Start HAL_ADC_Start_DMA( ...

With date code 005 I had to :

1. Enable ADC
2. Set previous stored calibration values
3. Disable ADC
4. Start HAL_ADC_Start_DMA( ...

Has anyone or ST an explanation for this?

Regards

Armin

Solved:

It was my mistake. I  was disabling deep power down and enabling the internal regulator while ADC was enabled. That was not such a good idea.

[Peter BENSCH]

Thank you for letting us know that the issue has been resolved.

Regards

/Peter