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TMS570LC4357: ADC result

Part Number: TMS570LC4357

Hi.

We use ADC1[9] and ADC1[31].

If only ADC1[31] is converted, the conversion result will be about 50. And if you convert only ADC1[9], the conversion result will be 4095.

But If you convert two(ADC1[9] and ADC1[31]) at the same time, the conversion result will be 4095 for both.

I expected both conversions to be 4095, but that's not the case. Why is the conversion result different when only the ADC1[31] is converted?

Best regards.

t2.tif