Hello EveryOne,
I find the ADC collect result is not correct when battery voltage is below 7V on S32k144 100pin, the test result as below:
7.6V -> 0x288
7.5V -> 0X27B
7.4V -> 0X272
7.3V -> 0X274
7.2V -> 0x275
7.1V -> 0x277
7.0V -> 0x27A
6.9V -> 0x27C
6.8V -> 0x27E
6.7V -> 0x281
6.6V -> 0x283
6.5V -> 0x286
I use SDK to config the ADC module, whether need to do other configure for ADC module, thanks
解決済! 解決策の投稿を見る。
Hi
Can you introduce the sampling circuit? The VADIN (ADC Input voltage) to S32K1 should be between VREFL - VREFH.
Please check if VREFH changes when the battery voltage drops, and make sure that the ADC input voltage and VREFH do not change.
Best Regards,
Robin
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Hi
Can you introduce the sampling circuit? The VADIN (ADC Input voltage) to S32K1 should be between VREFL - VREFH.
Please check if VREFH changes when the battery voltage drops, and make sure that the ADC input voltage and VREFH do not change.
Best Regards,
Robin
-------------------------------------------------------------------------------
Note:
- If this post answers your question, please click the "Mark Correct" button. Thank you!
- We are following threads for 7 weeks after the last post, later replies are ignored
Please open a new thread and refer to the closed one, if you have a related question at a later point in time.
-------------------------------------------------------------------------------
The issue is fixed, HW engineer check is VREFH voltage is not ok, update the IC, the issue is fixed.