Beginner in need of help !!

[richard]

if you don't need the cout as an actual physical output CM<2:0> = 110 is a better choice
and lets you chose pin 6 or 7 as your input (select with cmcon0.3 "CIS")

input to comparator is [ cin+ pin 7] or [cin- pin 6] with CM<2:0> = 110 its your choice

there are other modes but in all cases cin is only on pins 6,7

[richard]

if you need or can use the comparator output use CM<2:0> = 101
it still lets you chose pin 6 or 7 as your input (select with cmcon0.3 "CIS")

[robbo78]

Okay Richard thanks for your help.

So lets say I wanted an LED to be OFF if the voltage on cin+ is below 1.1v, & LED to be ON if the voltage is higher than 1.1v. Would I use this -

VR3 ... VR0 = 1000 (8) with a VDD of 3.3V the Vref will be (8/24) x 3.3 = 1.1V

I hope this is right lol

[richard]

there is not enough info to answer

what comparator mode ?
what cis setting
is vrr set
what cinv seting
how is led connected ?

[robbo78]

Richard, I'm specifically talking about just the VRR nothing else. I just want to know if I've got the workings out right. If you need the whole code to tell me if that part is right or not then I can do that no problem.

[richard]

that is correct it will set the reference to 1.1 for a vdd of 3.3v

[robbo78]

Thats great thanks for the help, now I can have a go at the code.