EPROM manufacturer and device IDs

[thergen at svn.net]

The info is available from the eprom, but the programmer may not support
reading it.  Here's an excerpt from amd's site: 
http://www.amd.com/products/nvd/techdocs/08007.pdf
"To activate this mode, the programming equipment must force Vh on address
line A9.  Two idenifier bytes may then be sequenced from the device
outputs by toggling addrress line A0 from Vil to Vih.  All other address
lines must be held at Vil during the autoselect mode.  Byte 0 represents
the manufacturer code and byte 1 , the device identifier code."

I'm not sure how much commonality there is among the manufacturers on the
use of this method.

Tom

On Thu, 20 Jul 2000, Ludis Langens wrote:

> thergen at svn.net wrote:
> > 
> > The eprom manufacturer id codes used might be from a jedec standard
> > (www.jedec.org).  Try publication 106 (JEP106-H).
> 
> Ok, I got the freely downloadable .pdf file - but it looked like the
> same thing was also for sale for $200.  What was that all about?  :-|
> 
> This solves half the equation.  I still need to guess between a 27256,
> 27C256, 27C256A, and so on.
> 
> -- 
> Ludis Langens                               ludis (at) cruzers (dot) com
> Mac, Fiero, & engine controller goodies:  http://www.cruzers.com/~ludis/
> ----------------------------------------------------------------------------
> To unsubscribe from gmecm, send "unsubscribe gmecm" (without the quotes)
> in the body of a message (not the subject) to majordomo at lists.diy-efi.org
> 

----------------------------------------------------------------------------
To unsubscribe from gmecm, send "unsubscribe gmecm" (without the quotes)
in the body of a message (not the subject) to majordomo at lists.diy-efi.org