MCUmall EPROM BIOS Chip Burner Forum - Reading 27128

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Reading 27128

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3 Posts

Posted - 03/13/2006 : 16:56:56

I am having trouble reading a 27128 chip from a Nissan ECU. I have the Enhanced Willem programmer. Everytime I read the chip the data is different. Looking at certain parts of the data, some of it is correct or mostly correct and other times completely wrong. When I try to do the verify it always gives me an error quickly. I desoldered the chip out of the ECU as best I could, maybe this chip got damaged? Or am I doing something wrong? Thanks.

Reply #1

ZLM

2945 Posts

Posted - 03/13/2006 : 20:44:18

The Enhanced willem does not work for most of 27128.

see

http://www.mcumall.com/forum/topic.asp?TOPIC_ID=16

Reply #2

3 Posts

Posted - 03/13/2006 : 21:31:10

I will mainly be flashing an AT29C256. I only need to read the 27128 chip once, is it at all possible?

Reply #3

ZLM

2945 Posts

Posted - 03/14/2006 : 21:16:10

Yes, it is possible. I think you need to route the power source by a wire.

Edited by - ZLM on 03/14/2006 21:17:06

Reply #4

3 Posts

Posted - 03/15/2006 : 09:08:52

Does anyone know what wires I need to cross to read this chip?

Reply #5

ZLM

2945 Posts

Posted - 03/15/2006 : 21:39:19

The 27128 is a 28 pin DIP chip. The Vcc pin is on pin 28. So, cross the pin 28 and ZIF 32. see if this works.

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