MCUmall EPROM BIOS Chip Burner Forum
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 True USB Willem Programmer (GQ-2X,3X,4X & GQ-4x4)
 Trying to write TMS2532JL but 25v missing

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T O P I C    R E V I E W
RetroByte Posted - 09/08/2023 : 07:46:00
Hello all, I’ve just purchased a GQ-4X4 to burn some TMS2532JL but they aren't getting written.

I'm only getting just over 23v on the VPP, but the datasheet for these chips says VPP should be 25v.

It goes through the write process but fails verifying.

I’ve added a 9v 2A external power supply and have also tried a powered USB hub.

I’ve run the power test, which says 25v is OK.

I've checked the devices.txt and it's set to 25v.
4   L A T E S T    R E P L I E S    (Newest First)
anniel Posted - 09/26/2023 : 07:20:39
quote:
Originally posted by Ronen 722

thanks for the reply, I havwe been reading the wrong chips - correct ones now Identified.



Excellent.
Ronen 722 Posted - 09/25/2023 : 05:29:55
thanks for the reply, I havwe been reading the wrong chips - correct ones now Identified.
anniel Posted - 09/10/2023 : 05:10:43
quote:
Originally posted by RetroByte

I'm thinking they might just be bad chips


Bad chips can pull the voltage down. Where does the chips come from?
RetroByte Posted - 09/09/2023 : 10:10:36
I'm thinking they might just be bad chips

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