Fixed voltage reference (fvr) for comparator

[ennng]

Hi every one!

just I want ask about the internal reference for comparator in PIC16F1827
it said in the datasheet :

FVR, is a stable voltage reference, independent of VDD, with 1.024V,
2.048V or 4.096V selectable output levels

so, can we use different or just these.
if the power supply is 3V ???

Cheers!!

 

[barry]

If you read the datasheet it states that Vr can't exceed Vdd (obviously). So if you want 4.096, you'll have to use VDD=5.

 

[ennng]

Yes! you are right
but in cause of using 3V as a power supply the two references voltage will stay as it is or gann change?
1.024V
2.048V
because in other pic microcontroller there is equation to determain the voltage reference and it bases on the power supply.