Very Simple ICSP Programmer

[NavMicroSystems]

Joe,

the PIC-PG2 is a JDM-type of programmer and will (most likely) NOT work on a 5V COM-Port !!

If you had told us you are working with a 5V COM-port,
we would have told you that the method you are trying is not going to work.

You must tie RB4 on the F628 to GND (or at least pull it low)
and you must apply high voltage (~13V) to the Vpp pin to make it work.

The links posted on this thread would have given this answer.

[JoeCJK]

Thanks Nav,

I tried it on a desktop and it works. But I think we are talking about different programming modes. Here is my rundown: (16F62X series)


Low Voltage Programming : MCLR is low(+ 5V) , MCLR is shorted to RB4 as
RB4 needs to rise to 5V also.

High Voltage Programming : MCLR is high(~ + 13V),
RB 4 has to be grounded



Voltages to Vdd of both modes are +5V. High voltage programming is better than low voltage programming in that all I/O pins can be used. (RB4 can't be used for LVP) But the downside is that it is harder to get 12 V source.