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 True USB Willem Programmer (GQ-2X,3X,4X & GQ-4x4)
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mithranthir

2 Posts
Posted - 02/06/2013 :  02:41:37  Show Profile  Reply with Quote
Hello, I bought a GQ 3X Programmer and I´m trying to read and write one 93C66BZ eeprom (SOIC 8) which is ONBOARD (I need to do it in this way beacuse i can´t desoldering the device). I´m using this tool: http://www.mcumall.com/comersus/store/comersus_viewItem.asp?idProduct=4406

Step by Step this is what i´m doing:

- look for this model at the device selection and I choose 93C66B (16 BIT EEPROM).

- I try to read the Device.

- The buffer is full of FFFFFFF.

I don´t know what is wrong. Could anybody help me? What is the right way step by step to read this eeprom? I send several photos show the situation:

1st - usig tool ONBOARD

Image Insert:

35.49 KB

2nd - Chip select

Image Insert:

34.86 KB

3rd - Lectura

Image Insert:

42.82 KB
Reply #1

Bad_Ad84

210 Posts
Posted - 02/06/2013 :  04:30:22  Show Profile  Reply with Quote
Not all chips can be programmed on board - it depends very heavily on the circuit design. You should remove the chip and read/write it that way if on board isnt working.
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Reply #2

mithranthir

2 Posts
Posted - 02/08/2013 :  06:24:54  Show Profile  Reply with Quote
I have desoldered the chip and try to read and write it and it works. Thank you very much.
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