Author Topic: AM2732B and TL866ii+  (Read 151 times)

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Offline Wawavoun

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AM2732B and TL866ii+
« on: April 13, 2021, 04:04:21 pm »
Hello there,

I have two AM2732B eprom. I assume they are not counterfeit because writing is acetone resistant...

The marking say "12.5V pgm", datasheet say same, so TL866ii+ should do the job !

They are in the supported ic list and after selecting Xgpro parameters look good (VPP 13V, VDD write 6.5 V, VCC verify 5 V, pulse delay 500 µs).

Pin detect, blank check  and reading work well.

But there is no way to program these eprom.
Immediately after writing sequence start I got the message "Program failed". No progress bar etc....
Log file don't give any valuable information.
The problem is the same on both eprom, also under windows 10 or linux+wine.
With a pulse delay of 1 ms problem is the same.

Anything I can try to improve the situation ?

Also : what means "VDD write" and "VCC verify" into Xgpro ?

Thanks for your advice.
Philippe


« Last Edit: April 13, 2021, 04:18:41 pm by Wawavoun »
 

Offline Wawavoun

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Re: AM2732B and TL866ii+
« Reply #1 on: April 13, 2021, 04:32:48 pm »
I just give a try with minipro.

I notice that after more or less 6 trys with pulse at 12500 µs the error switch to the second byte... Repeating again 6 trys and the error then switch to byte 3...

So now I will run minipro without verification (so it goes to eprom end even with error) and I will do that 10 times for security...

Will see...
 

Online wraper

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Re: AM2732B and TL866ii+
« Reply #2 on: April 13, 2021, 04:43:10 pm »
I assume they are not counterfeit because writing is acetone resistant...
EPROM counterfeits are immune to acetone by default. They remove old paint marking with solvent and apply new marking with laser. You should check if silicon die looks as it should.
 

Offline ChristofferB

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Re: AM2732B and TL866ii+
« Reply #3 on: April 13, 2021, 04:53:06 pm »
I have had many issues with the tl866 and 2716 and 2732 eproms. I'm unsure if it's the chips or the burner but I've resorted to just making pinout adapters and using the lower half of a 2764
--Christoffer //IG:Chromatogiraffery
Check out my scientific instruments diy (GC, HPLC, NMR, etc) Channel: https://www.youtube.com/channel/UCZ8l6SdZuRuoSdze1dIpzAQ
 
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