MCUmall EPROM BIOS Chip Burner Forum
MCUmall EPROM BIOS Chip Burner Forum
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 True USB Willem Programmer (GQ-2X, GQ-3X, GQ-4X)
 ST M48T86 Real Clock battery - please help
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F-bone

30 Posts

Posted - 11/27/2015 :  00:29:45  Show Profile  Reply with Quote
Hi guys,

I got an old computer from a press which needs a new programmable battery since it gives an error message about CMOS. I need to replace the old one but must also transfer its program.

IC: ST M48T86

Can this be done with GQ-4x?

BR,
George
Reply #1

anniel

1996 Posts

Posted - 11/27/2015 :  13:51:18  Show Profile  Reply with Quote
This is an equivalent of the DS12887. If the internal battery is dead you lost the data that was in the NVRAM. You need to find a copy of the binary file.
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Reply #2

F-bone

30 Posts

Posted - 11/29/2015 :  23:21:29  Show Profile  Reply with Quote
quote:
Originally posted by anniel

This is an equivalent of the DS12887. If the internal battery is dead you lost the data that was in the NVRAM. You need to find a copy of the binary file.



thank you, I will look into this further.
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Reply #3

anniel

1996 Posts

Posted - 12/02/2015 :  05:31:03  Show Profile  Reply with Quote
Keep us informed.
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Reply #4

F-bone

30 Posts

Posted - 02/08/2016 :  03:32:43  Show Profile  Reply with Quote
quote:
Originally posted by anniel

Keep us informed.



forgot to do so..

We replaced the chip and problem solved :)
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Reply #5

anniel

1996 Posts

Posted - 02/08/2016 :  04:46:47  Show Profile  Reply with Quote
You are lucky no critical data like calibrations was lost with the dead battery.
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Reply #6

F-bone

30 Posts

Posted - 02/08/2016 :  07:29:38  Show Profile  Reply with Quote
quote:
Originally posted by anniel

You are lucky no critical data like calibrations was lost with the dead battery.



if that was the case we would need a donor board to read the chip that was still operational. but how would we do that? I think we did not clarify this part :)
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Reply #7

anniel

1996 Posts

Posted - 02/08/2016 :  07:56:38  Show Profile  Reply with Quote
The chip retains the data until the battery is dead. You can copy a chip or back it up as any other chip.
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Reply #8

F-bone

30 Posts

Posted - 02/09/2016 :  06:38:57  Show Profile  Reply with Quote
quote:
Originally posted by anniel

The chip retains the data until the battery is dead. You can copy a chip or back it up as any other chip.



using what setting with gq-4x???
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Reply #9

anniel

1996 Posts

Posted - 02/09/2016 :  07:22:28  Show Profile  Reply with Quote
You would need to look at the datasheet.
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