Dear Stewart,

I think you can find the answer from the book
"Design with PIC Microcontrollers" by John B. Peatman
or try to email to
john.peatman@ece.gatech.edu

Regards,
Samuel Lau

Stewart Pye wrote:

> Hi...
>
> I'm testing a project that uses a 16C74A. I've used the 16F84 quite a bit
> but this is my first try using the 16C74 with a HS osc at 16Mhz.
>
> Problem:
> I cant even get an led to flash. I know the code is correct. I set the osc
> to HS.
>
> Question:
> Are the two VDD and VSS pins connected internally???
> I got 12ohms between the 2 Vss pins but several Mohms between the Vdd pins.
> Is this correct??
> Should I connect these pins externally???
> Is there something else that could be causing the problem?
>
> Any help would be much appreciated. (the frustration's building)
>
> Thanks,
> Stewart Pye