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Author Is anyone knowledgeable with EEPROM / SPI programming?
DaveyLC
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Registered: 8th Oct 08
Location: Berkshire
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   30th Oct 14 at 17:04   View User's Profile U2U Member Reply With Quote
Ok.. I've f**ked up.. I've tried to copy the contents of one SPI chip to another but thankfully I backed both up before starting.

I've got a dash-board with an LCD fault and the replacement one requires programming at a main-dealer so I thought I'd be clever and flash a copy of the SPI memory between the two which has EPICALLY failed ..

The IC in question is a "Microchip 25LC640" and I've been using an in-circuit programming clip with a CH341A programmer..

I've read the original data just fine and I can blank the chip but when I try and flash contents back it jus simply writes garbage and it wont verify..

WTF am I doing wrong? I know CS has its fair share of geeks and I'm hoping someone can help me salvage this situation



[Edited on 30-10-2014 by DaveyLC]
Ian
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Registered: 28th Aug 99
Location: Liverpool
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30th Oct 14 at 17:26   View Garage View User's Profile U2U Member Reply With Quote
LCD "fault"
DaveyLC
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Registered: 8th Oct 08
Location: Berkshire
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30th Oct 14 at 17:37   View User's Profile U2U Member Reply With Quote
As in only half of the pixels (on a good day) on the LCD display work.. Don't worry I'm not faffing with mileage
DaveyLC
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Registered: 8th Oct 08
Location: Berkshire
User status: Offline
31st Oct 14 at 10:39   View User's Profile U2U Member Reply With Quote
Turns out its a 64kbit SPI EEPROM not a 64mbit one.. Woopsie..
Ian
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Registered: 28th Aug 99
Location: Liverpool
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1st Nov 14 at 11:33   View Garage View User's Profile U2U Member Reply With Quote
Yeah that's what I was thinking

 
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