PortA.4 not working on 16F690

[Archangel]

Ok, just rechecked the datasheet. Unless I'm reading it wrong, page 59 (as described above) and page 60, paragraph 4.2.1 contradict each other.

Also, which one is it? RA4 or AN4?

That confused you too? I thought it was only me.

[skimask]

That confused you too? I thought it was only me.

I checked the errata...nothing there.
We must be missing something somewhere.
Maybe the only way to figure it out is to try it, or maybe one of those other config bits overrides the ANSEL bits...or maybe it's time for another beer...

[sougata]

Hi,

If the config fuses are not properly set (page 197 datasheet) this pin will function as a clock out (Fosc/4) with the internal oscillator enabled. Please check.

[modifyit]

Sorry about that phat finger disease. PortA.4, RA4 is the pin I am having issues with.

I've double checked the config and its set for INTOSCIO so it should not be acting as an oscillator out pin. I've also read the chip back into my programmer and it shows the config is set correctly.

and yes it is time for another beer

[skimask]

Sorry about that phat finger disease. PortA.4, RA4 is the pin I am having issues with.

I've double checked the config and its set for INTOSCIO so it should not be acting as an oscillator out pin. I've also read the chip back into my programmer and it shows the config is set correctly.

and yes it is time for another beer

Try the ANSEL bits the other way around. You have them set as 0's, try them set as 1's. Like I said earlier, I think the datasheet is contradicting itself.

[modifyit]

got it to work! some how my settings on the melabs programmer got goofed up and the config vars wern't writing to the chip.

[Archangel]

It seems the difficult problems are easier to find !