MCUmall EPROM BIOS Chip Burner Forum
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 True USB Willem Programmer (GQ-2X, GQ-3X, GQ-4X)
 Issue with CSI93c56a
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luklyz

6 Posts

Posted - 04/25/2015 :  05:47:43  Show Profile  Reply with Quote
Hi
I have a issue with CSI93c56a.
Reading the chip: i select a generic 93c56, csi93c57, comes back with weird data. Selecting Fairchild f-93c56 gives me a good (correct) data, but cant write the chip. It writing but cant verify and nothing changes. After few attempts of writing, the chip reads all ff.
I`m assuming the chip is damaged.
I`m wondering if you are going to provide a support for for this chip.
Do you have other suggestions.
Reply #1

ZLM

2923 Posts

Posted - 04/25/2015 :  21:37:09  Show Profile  Reply with Quote
The chip should be fine.

This chip should be supported.

Can you find the datasheet of this chip?

Try slower speed.
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Reply #2

luklyz

6 Posts

Posted - 04/26/2015 :  19:29:54  Show Profile  Reply with Quote
CSI is a CAT am I right? here is a link for CAT 93c56
h**p://datasheet.octopart.com/CAT93C56LI-G-ON-Semiconductor-datasheet-5319227.pdf

I tried lower speed. No luck. Only Fairchild is reading fine but is not writing properly.
I'm willing to try anything to make this work.
Thank you
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Reply #3

ZLM

2923 Posts

Posted - 04/26/2015 :  23:15:01  Show Profile  Reply with Quote
It looks like nothing special.

The CAT93c56 chip is compatible with 93C56C. In that case you can try 93C56C_8bit and 93C56C_16bit from software.
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Reply #4

luklyz

6 Posts

Posted - 04/30/2015 :  18:51:25  Show Profile  Reply with Quote
its not working, its not reading right. im wondering if all the pins should be connected?
thank you
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