The config register for the 877 has more bits that need to be 'set'
than the 84. You might have problems using an 84 programming software
to program the 877. Try the updated programming software from
www.picwiser.com.

Aaron Martin wrote:

> Guys,
>     I have successfuly gotten a 16F84 up and running and made an attempt
> at getting
> a 16F877 up, but I'm stumped.
>
> The pic is programmed correctly (verified using a protoboard, I am
> blinking Port D.0 through D.2)
>
> I wired it up using the same "concept" as the 16F84:
>     OSCin/OSCout (pins 13/14) to a Crystal (same crystal that I used on
> my 16F84, 10mhz).  With 22pf caps to ground.
> 4.7k resitor to +5v on Pin 1 for MCLR.  +5v on pins 11 and 32 with a
> .1uf cap to ground. 12 + 31 to ground.
> I then wired pin 21 (Port D.2) to a 470 ohm to a led...
>
>     I don't see any voltage change on port D at all...as if either no
> clocks are running, or the chip is in reset... OR I
> don't know about something else I should have wired up... Anyone have
> any ideas?
>         -- Aaron



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