MCUmall EPROM BIOS Chip Burner Forum
MCUmall EPROM BIOS Chip Burner Forum
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 True USB Willem Programmer (GQ-2X,3X,4X & GQ-4x4)
 AM29F032B quit working, worked fine last night

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Necrosaro420 Posted - 02/25/2013 : 11:28:05
Now none will burn.

write failed, address=0x000000, buffer=0x18 device=0xff

Using gq-4x, adp-077 and adp-08x (not sure that model offhand, 2 I think)
7   L A T E S T    R E P L I E S    (Newest First)
Bad_Ad84 Posted - 03/08/2013 : 06:50:48
I have the same issue with the AM29F032B (but not the M29F032B)

It required a Z5U 100nf cap between VCC and GND, then it works.

Reading seems to be fine without the cap. A normal 100nf ceramic cap didnt work (I sent the chips to the people who made my programmer, they found the issue).
ZLM Posted - 03/06/2013 : 20:18:47
I ordered some AM29F032B. They should arrive next week. I will do a complete test then. Tested with ST M29F032B TSOP40. But no problem found.
Necrosaro420 Posted - 03/06/2013 : 14:50:37
bump
Necrosaro420 Posted - 03/02/2013 : 01:19:35
Ok I noticed something on these chips, I clicked the L button (lock/unlock) and had it read. It appears the first 4 sections are locked, the other 4 are not. I checked another type of chip not in that batch, and all are unlocked. So I tried unlocking the chips that are not working, and they will not unlock. Any ideas?
Necrosaro420 Posted - 03/01/2013 : 17:33:52
These are:

AM29F032B -90EC
0104GPB H
1998 AMD
Necrosaro420 Posted - 03/01/2013 : 13:25:43
The chips I am using are from the same batch/person. All exact model numbers purchased together. Burned 3 and worked fine, soldered them to what I needed to, and works great. Went to bed, woke up, now none of them will burn. Also purchased a new burner/scriptdapters that arrived today, and still does this.
ZLM Posted - 02/26/2013 : 09:52:14
looks like chip related. Change to another chip. To approve, use last worked chip and try again.

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