ISP for Winbond W78E516

Does anybody in the forum has successefully
programmed Winbond W78E516 using flash utilities
downloaded from this website. I have been
trying hard, but no luck so far. I feel that
the provided documents are far for complete.
My problem is that the ISPWRITER.exe does
not communicate with the targeted device.
Here are what I have done.

1. Program the LDU30919.BIN file into the
device via conventional programmer.
2. Tie pin P2.6, and pin P2.7 LOW, and
RESET pin HI.
3. Execute ISPWRITER.EXE

The problem is that each time I hit CONNET
bar, error comes up "connection failed".
Eventhough, I have confirmed several times that my RS232 comm worked properly using
Hyper terminal program.

Any body has any idea? what I did wrong here.

JIMMY

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  • Hi Jimmy,

    I have written an ISP for W78E516 before. Since your Rs232 comm works fine, I guess the only thing that you should double check is to make the chip enter ISP mode first. There are two work modes on W78E516, 64K normal mode( start from 0000h) or 4K upgrade mode (start from 10000h). Don't forget to burn your ISP at 10000h.

    BTW, I didn't find ISPWRITER.EXE and LDU30919.BIN, so I can't test it and don't know whether they are bug free.

    Frank Hu

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  • Hi Jimmy,

    I have written an ISP for W78E516 before. Since your Rs232 comm works fine, I guess the only thing that you should double check is to make the chip enter ISP mode first. There are two work modes on W78E516, 64K normal mode( start from 0000h) or 4K upgrade mode (start from 10000h). Don't forget to burn your ISP at 10000h.

    BTW, I didn't find ISPWRITER.EXE and LDU30919.BIN, so I can't test it and don't know whether they are bug free.

    Frank Hu

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