In-circuit Serial Programming of 64 pin TQFP-type PIC18F6520 using Self powered JDM?
I have a self powered JDM programmer. It can be connected to my desktop as well as to laptop. Presently I am using my laptop for programming PIC16F72.
JDM has following pin-type selector: 12, 18, 20, 28 and 40 pins.
The socket is ZIF type. So I cannot use it to program TQFP (Quad type miniature PIC).
I want to do ICSP of PIC18F6520 and PIC18F8520.
IC-Prog does not have these devices on the device select menu.
I have connected the JDM to my laptop through RS232 port.
As IC-Prog does not have above devices, I selected PIC18F6620... a similar device.
I tried to identify VPP, VDD, VSS, PGD, PGC on the ZIF in 40 pin mode as well as on my PIC18F6520.
I connected these together. I also connected PGM to GND.
The voltage I get on VPP is 2.54 V.
After programming, verification fails everytime.
PS: When I use the same technique to program PIC16F72 the programming is successful. Meaning I put JDM in 28 pin mode. Then I identify VPP, VDD, VSS, PGD and PGC on the ZIF socket. Then I connect these wires to appropriate pins on PIC16F72 on the bread board. The programming is successful.
Thanking you in anticipation,
M Vinod Kumar