• Please review our updated Terms and Rules here

Identify an EEPROM??

T

tblake05

Experienced Member
Joined
Aug 21, 2017
Messages
295
Location
Minnesota
Is there a way to identify an eeprom that the manufacturer has etched the top blank? It is a 32 pin DIP. I have a TL866 Mini Pro.

I just want to make a copy of it to use for diagnosis. Any ideas?

Thanks!
 
I tried reading as a winbond 27c020 and it returns pin 30 (A17) as a bad pin. Doubt it, cause it works fine.
 
I have no knowledge of using a TL866 device programmer. When you try to read the device, does it report the actual device ID, or only report that it is not what is expected? Most EPROM / EEPROM devices, except for the early EPROM devices, support a device ID mode, were you put +12V on A9, and A0=L returns the Manufacturer Code and A0=H returns the Device Code. If it does report the Manufacturer Code and Device Code, those could probably be used to look up what the device is.
 
Last edited:
SEEQ and ye shall find. (maybe)
(SEEQ was a brand of EEPROM)

One can usually tell the capacity of an EEPROM by the number of address pins it has.
Most EEPROMs conform the JEDEC standard pinouts so you should be able to read its data contents irrespective of whether it supports a vendor ID or not.
The Vcc/Vdd voltage also helps with identification.

Are you sure it’s not a Flash ROM?
 
gslick said:
I have no knowledge of using a TL866 device programmer. When you try to read the device, does it report the actual device ID, or only report that it is not what is expected? Most EPROM / EEPROM devices, except for the early EPROM devices, support a device ID mode, were you put +12V on A9, and A0=L returns the Manufacturer Code and A0=H returns the Device Code. If it does report the Manufacturer Code and Device Code, those could probably be used to look up what the device is.
Click to expand...
When I do a "check ID", it returns 1E 05

Someone said:
SEEQ and ye shall find. (maybe)
(SEEQ was a brand of EEPROM)

One can usually tell the capacity of an EEPROM by the number of address pins it has.
Most EEPROMs conform the JEDEC standard pinouts so you should be able to read its data contents irrespective of whether it supports a vendor ID or not.
The Vcc/Vdd voltage also helps with identification.

Are you sure it’s not a Flash ROM?
Click to expand...
...Nope.
 
gslick said:
I have no knowledge of using a TL866 device programmer. When you try to read the device, does it report the actual device ID, or only report that it is not what is expected? Most EPROM / EEPROM devices, except for the early EPROM devices, support a device ID mode, were you put +12V on A9, and A0=L returns the Manufacturer Code and A0=H returns the Device Code. If it does report the Manufacturer Code and Device Code, those could probably be used to look up what the device is.
Click to expand...
Genius!

I used this website to reference what Eprom it is..
ctrl-alt-rees.com

EPROM Device ID List

Here’s a list of EPROM device IDs, as used in EPROM programming software such as XGPro. This is the most complete list I’ve come across and I struggled to find one, so it’s presented here for reference just in case it’s of any use to anyone.
ctrl-alt-rees.com ctrl-alt-rees.com

Atmel AT27C010 Dip32. And it read 100%. Thanks!!!
 
You must log in or register to reply here.
Back
Top