Hello all
I have built a JDM style programmer for the pic16f84a and it works fine. Can someone help me with converting the programmer to take a 16f877a?

I know I need to tie RB3 low to ground but where do I go from here?

Any help is greatly appreciated!

Thanks

 

This is the JDM programmer I am using. Works great, but what are the pinouts for the 877A?

Attached Images

newpic0.gif (3.3 KB, 204 views)

 

Please note that the pins on the picture are NOT in numerical order.

 

Thanks for the diagram Exo.

Are these the correct pin connections for the above programmer to program the 877a?


PIC16F84A -> PIC16F877A

Pin 4 (MCLR) -> Pin 1 (MCLR)
Pin 5 (Vcc) -> Pins 12,31 (Vcc)
Pin 12 (RB6) -> Pin 39 (RB6)
Pin 13 (RB7) -> Pin 40 (RB7)
Pin 14 (Vdd) -> Pins 11,32 (Vdd)

Thanks

 

Yeah, that should be it...

Also make sure the programming software you use is able to program the 'A' version. There is a diffirence in the algorithm used to program a 16F877 and a 16F877A

 

Thanks Exo. I will give it a shot.