MCUmall EPROM BIOS Chip Burner Forum
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 Can't program 16F628A
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2 Posts

Posted - 01/15/2008 :  18:51:35  Show Profile  Reply with Quote
I have the enhanced JDM programmer and I'm having trouble programming the 16F628A. I've successfully programmed a 16F877A and a 12F675, so I know the programmer is ok.

PicPgm finds the programmer and identifies the PIC as a 16F628A. When I try to program, it says it works, but verify fails. Reading the chip shows all 0's. I can erase and if reverts back to 3FF.

I've tried PicPgm, WinPic800 and IcProg with similar results.

Anyone have any suggestions?
Reply #1


2929 Posts

Posted - 01/19/2008 :  01:11:02  Show Profile  Reply with Quote
Check the code protection bit. It seems that bit been enabled.
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Reply #2


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Posted - 01/24/2008 :  16:29:14  Show Profile  Reply with Quote
Thank you!

Yes, the code protect was set in the sample hex file I downloaded to test. The program I was using didn['t make it clear until I checked with another.

I turned off code protect and it is working fine now.
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