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 True USB Willem Programmer (GQ-2X, GQ-3X, GQ-4X)
 M27V322 write Fix
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Tuco

Australia
18 Posts

Posted - 12/13/2017 :  12:26:29  Show Profile  Reply with Quote
Mainly with the help of user anniel I finally got my M27V322 chips to write.
The A19, A20 and A21 address lines had to be connected from the main board to the adaptor board as per one of the sticky posts.
The tricky part was the devices.txt file had to be altered for the M27V322. User anniel pointed out the write voltage needed to be 6.2v as per the datacheet.

This is the altered line with the added text in red.
Name="M27V322",ID="XXXX",Class="27C322",Category="EPROM",MFG="ST",CodeSize="4194304",VCC="3.3V",Adapter="ADP-054, ADP-055 16 BIT EPROM ADAPTER"],WVCC="6.2v";
Reply #1

anniel

1996 Posts

Posted - 12/13/2017 :  17:11:24  Show Profile  Reply with Quote
quote:
Originally posted by Tuco

Mainly with the help of user anniel I finally got my M27V322 chips to write.
The A19, A20 and A21 address lines had to be connected from the main board to the adaptor board as per one of the sticky posts.
The tricky part was the devices.txt file had to be altered for the M27V322. User anniel pointed out the write voltage needed to be 6.2v as per the datacheet.

This is the altered line with the added text in red.
Name="M27V322",ID="XXXX",Class="27C322",Category="EPROM",MFG="ST",CodeSize="4194304",VCC="3.3V",Adapter="ADP-054, ADP-055 16 BIT EPROM ADAPTER"],WVCC="6.2v";



Thank you for your contribution. In fact you worked out most of it.
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