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robertjhurst
United Kingdom
2 Posts |
 Posted - 04/12/2023 : 01:44:11
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Hi all, I'm trying to read the contents of the above to make a backup file, but can't find it on the list of devices.
I'm using a GQ-4X programmer.
There is a datasheet for the device here: h**p://www.limpulsion.fr/upload/docs/DM52B33H300.PDF
Can anybody advise how I might proceed?
Many thanks. |
Edited by - robertjhurst on 04/12/2023 01:45:50
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| Reply #1
anniel
2596 Posts |
Posted - 04/12/2023 : 06:11:41
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quote:
Originally posted by robertjhurst
Hi all, I'm trying to read the contents of the above to make a backup file, but can't find it on the list of devices.
I'm using a GQ-4X programmer.
There is a datasheet for the device here: h**p://www.limpulsion.fr/upload/docs/DM52B33H300.PDF
Can anybody advise how I might proceed?
Many thanks.
Start with the 27C64 and drop VPP to 5V. |
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| Reply #2
robertjhurst
United Kingdom
2 Posts |
Posted - 04/12/2023 : 23:12:52
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quote:
Originally posted by anniel
Start with the 27C64 and drop VPP to 5V.
Ok, thanks. I was trying to use a 27C64 as a drop in replacement as they are a lot more available. The machine wouldn't recognise it though so wanted to copy the prog across in case it needs a format.
What's the deal with Pin 1? Tied high on the 52B33, I've left it floating on the 27C64
Many thanks. |
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| Reply #3
anniel
2596 Posts |
Posted - 04/13/2023 : 04:46:33
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quote:
Originally posted by robertjhurst
quote:
Originally posted by anniel
Start with the 27C64 and drop VPP to 5V.
Ok, thanks. I was trying to use a 27C64 as a drop in replacement as they are a lot more available. The machine wouldn't recognise it though so wanted to copy the prog across in case it needs a format.
What's the deal with Pin 1? Tied high on the 52B33, I've left it floating on the 27C64
Many thanks.
Pin 1 on the 52B33 if low should erase all the chip. |
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SEEQ 52B33-250
