12c508A -- Using more Legs...

[guest_05]

Alright guys,

Please can somone tell me the @ config to allow me to use more legs on the 12c508A -- and to use the internal timer. So no other components are needed.

I read on here that i can use a 12F675 to develop, then use 12c508a as main chips as they can only be writen once.


Please can somone show me how to config the 12c508a to use 4 legs as outputs, and not need any other components.


Many thanks.

i use MicroCode Studio.

Regards.

[Darrel Taylor]

If you want to develop for a 12C508A, then you should use a 12F508.

The 12F675 is a 14-bit core device, and the 12F(C)508 are12-bit cores. There are several PBP commands that you can't use on 12-bit devices. And with only a 2 level hardware stack, you can't even use Gosub's. So developing using the 12F675 is not a good idea.

PBP's default configuration for the 12C508A is ... Internal Oscillator, MCLR On.

So there are already 5 pins available without changing anything. The only pin not available for general I/O is GP3/MCLR/VPP.

[guest_05]

Thanks for the reply!

I will have to give it a go. I've only been trying with proteus sim, and it wouldnt let some of the legs work.

All i really want to do is flash 3 led's in order, so i think a 12c508A should be ok for that. Maybe. haha.

Thanks for the 12F508 idea! im glad i didnt make that mistake.

Thanks again,

Regards.