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 True USB Willem Programmer (GQ-2X, GQ-3X, GQ-4X)
 Can't erase 28C16
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BobA

USA
2 Posts

Posted - 08/24/2017 :  16:20:41  Show Profile  Reply with Quote
I have a GQ-4x4 with the 7.11 software. One of the supported devices is the AT28C16 and the programmer can program it, but when attempting to erase the device, it pops up an error about not being able to erase this device.

How can I enable the erase?

Reply #1

BobA

USA
2 Posts

Posted - 08/28/2017 :  17:08:13  Show Profile  Reply with Quote
Okay, so apparently nobody else has used a 28C16 with a GQ-4x4.

Is there a good definition of exactly what all the fields in the device descriptor file mean? Can I specifically program the erase algorithm, which voltages to apply to which pins, etc? The only documentation I found so far was lacking details. Maybe there is a more detailed explanation of how to add new devices somewhere? If I can find the documentation, I can probably solve my current problem.
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Reply #2

anniel

1996 Posts

Posted - 09/15/2017 :  05:31:21  Show Profile  Reply with Quote
quote:
Originally posted by BobA

I have a GQ-4x4 with the 7.11 software. One of the supported devices is the AT28C16 and the programmer can program it, but when attempting to erase the device, it pops up an error about not being able to erase this device.

How can I enable the erase?





Maybe you have an OTP.
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Reply #3

anniel

1996 Posts

Posted - 09/15/2017 :  05:32:02  Show Profile  Reply with Quote
quote:
Originally posted by BobA

Okay, so apparently nobody else has used a 28C16 with a GQ-4x4.

Is there a good definition of exactly what all the fields in the device descriptor file mean? Can I specifically program the erase algorithm, which voltages to apply to which pins, etc? The only documentation I found so far was lacking details. Maybe there is a more detailed explanation of how to add new devices somewhere? If I can find the documentation, I can probably solve my current problem.



Right in the devices.txt.
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Reply #4

ZLM

2923 Posts

Posted - 09/21/2017 :  21:04:25  Show Profile  Reply with Quote
28C16 is EEPROM chip. It does not need to be erased before write. Fill the buffer with FF and then write will erase whole chip. Also, try slower speed when write fail.
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