REF Module

Harsh Patel said:

Does the device have a REF Module built in or not?

No. The ADC12 is the only module that requires a reference, so no dedicated REF module was necessary.

Harsh Patel said:

Can I use internally generated reference voltage?

Yes. It is programmed from within the ADC12 module. Either 1.5 or 2.5V. It has, however, a rather high factory tolerance, so perhaps a good external reference may perform better. It is, however, sufficient for the most purposes.

If the REF Module is not there, then how can I use internally generated reference Voltage?

Is there an example anywhere?

Harsh Patel said:

If the REF Module is not there, then how can I use internally generated reference Voltage?

The REF module is actually an excerpt from the ADC12 for those devices where the reference is needed for more than jsu tthe ADC12.
The ADC12 had and still has most of the controls which are present in the REF module (if any) and in fact, where there is a REF module, it has a control bit that moves the control back to the ADC12 registers (which unfortunately isn't set by default, so old functions still need to know and support this bit if there is a REF module and won't simply work with the ADC12 as they always did)

All information needed is in the ADC12 section of the 5xx family users guide. (and the REF description also contains all info you need to answer your question. just read it. All of it.) To Mulders: "The truth is out there!" I might add: "It's right before your eyes. Just open them."

Also, there are MANY threads dealing with ADC (including setting the reference) here in the forum.