Problems programming 2732's

Riptor

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Anyone else have problems programming 2732 roms? Im using a USB pocket programmer 3.
Im having about a 1 percent success rate on these...not good. I think I may have got a bad batch of eproms from eprom man since most of these came from him. I have about 100 of them and cant find enough to program a few roms, very frustrating.
The faq on transtronics website says alot of the 2732 were programmed at the wrong voltage at the factory and they worked but cant be reprogrammed once erased. Any truth to this or is this some excuse why their programmer wont do 2732?
 
I have periodically had trouble with 2732's. Try erasing them for 2x the normal time. They seem to get "sticky" and need to be cleaned hard. If that doesn't work, get some glue and some of those small glue on googley eyes and go artistic with them.

ken
 
I have tried erasing them longer, doesnt seem to matter. They are reporting erased but just wont program.
Im heading to the craft store to get some googly eyes now. I already have the hot glue gun.
 
You can send em to me and I will program them..... I programmed 12 of them recently...

I have a Hilosystems ALL-02 Eprom programmer.... Does all the 27xx chips.... The last ones I did were at 21 volts...

-Mike
 
You could try my programmer if you want. I will check and see if the bp micro software supports them tonight for you if you want.
 
If you want, send me a couple that didn't burn for you and I'll see if my old Needham's PB-10 has a problem with them. I just burned a couple 2532 and 2732 EPROMs last week without incident.

If they burn for me I'll pay you for them since I only have a couple spare. ;)
 
Anyone else have problems programming 2732 roms? Im using a USB pocket programmer 3.
Im having about a 1 percent success rate on these...not good. I think I may have got a bad batch of eproms from eprom man since most of these came from him. I have about 100 of them and cant find enough to program a few roms, very frustrating.
The faq on transtronics website says alot of the 2732 were programmed at the wrong voltage at the factory and they worked but cant be reprogrammed once erased. Any truth to this or is this some excuse why their programmer wont do 2732?

I've never had problems with 2732's but I've always used burners with external power supplies. Perhaps the USB supplied voltage/current just isnt good enough for those EPROMs.

Matt
 
Anyone else have problems programming 2732 roms? Im using a USB pocket programmer 3.
Im having about a 1 percent success rate on these...not good. I think I may have got a bad batch of eproms from eprom man since most of these came from him. I have about 100 of them and cant find enough to program a few roms, very frustrating.
The faq on transtronics website says alot of the 2732 were programmed at the wrong voltage at the factory and they worked but cant be reprogrammed once erased. Any truth to this or is this some excuse why their programmer wont do 2732?

Those crappy USB programmers often can't generate (and maintain) a high enough 21/27V to program older 2732s (and 2716s). Often, if they've been erased for too long, there's negative charge on the floating gates, and it takes several (or many) tries to get them to reburn. You'll see this with bytes that start out FF, but a few bits will program after a couple tries, and if you keep trying to program, it'll eventually clear out the stored charge and just work...

If you're still stuck at FF on byte 0 after 4-5 programming attempts, toss the chip.
 
You could try my programmer if you want. I will check and see if the bp micro software supports them tonight for you if you want.

The BP will support them, but sometimes they are just fried. I think there are several varieties of 2732's and if you burn them with the wrong manufacturers configuration they will not burn or you will burn them permananently. Some program at 21V and some at 25V and some at 12.5V. If you program the 21V or 12.5V versions at 25V they are toast. The previous programming may have toasted a few on you.

The BP software has a ton of variations (30+) and serveral versions for most manufacturers. They all read the same, but the programming for each is sllightly different.

AMD2732s burn at 25V
AMD2732As burn at 21V
AMD2732s burn at 12.5V
some 27C32s burn at 6V
Nat'l Semi 27C32s burn at 25V

So not all 2732s are created equal. :eek:


ken
 
My programmer has an external power supply so I doubt thats the issue. Im using the correct voltage setting on them. The 2732 is 25v and the 2732a is 21v.
Billy, I will give you some of these and see if you can program them.
Im supposed to be getting about 400 of them this weekend if I can find them in the warehouse.
 
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