Meaning of ADC Status and Control Register 1 (ADCH)

[sungjun]

hello! NXP Team
I am curious about the meaning of ADC Status and Control Register 1 5-0 bit.
How does it work if Reserved is selected in ADCH (5-0bit)?
Are all channels turned off?
It's a simple question, but please answer it.
thank you.

[danielmartynek · Accepted solution]

Hi @sungjun,

The ADCH is a MUX where the reserved channels are not connected to any source.

ADC conversions can be triggered at the reserved inputs.

Writing SC1A[ADCH = Reserved] triggers a new conversion.

But the results should be ignored.

Best regards,

Daniel

[sungjun]

Thanks for answering my question.

The RM document explains that if you set all values as shown below, the conversion will stop.

What you said is that ADC conversion can be triggered, so I'm a little confused.

ADC conversion will be triggered, but should I understand that the user should ignore the value?

[danielmartynek]

Hi @sungjun,

ADCH set to all 1s is not reserved though.

Regards,

Daniel

[sungjun]

Hi. @danielmartynek 

Thanks for your reply.

I mistook it for 011111b - Reserved.

have a good day~!