Welcome to our site!

Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

  • Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

need help with pic16f877a programmer, please!

Status
Not open for further replies.

Beefer3

New Member
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
 

Beefer3

New Member
oops forgot to add the schematic

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

Attachments

  • newpic0.gif
    newpic0.gif
    3.3 KB · Views: 315

Exo

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

pic16F877A1-1.png
 

Beefer3

New Member
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
 

Exo

Active Member
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
 

Beefer3

New Member
Thanks Exo. I will give it a shot.
 
Status
Not open for further replies.

Latest threads

EE World Online Articles

Loading
Top