On Wed, 22 Aug 2001 01:03:20 -0700, Preston L. Bannister wrote:
>OK it seems I've learned a few things tonight. Likely this is common
>knowledge to hardware folks, but that's not my usual domain :).
>
>It seems that most manufacturers use a common notation for EEPROMs:
>
> 2Mb (256KB) EEPROM = (manufacturer prefix) + 29F020
> 4Mb (512KB) EEPROM = (manufacturer prefix) + 29F040
> 8Mb (1MB) EEPROM = (manufacturer prefix) + 29F080
>
>The 'F' is the package type (seems 'F' is most common).
EEPROM is a general term. The parts above are flash. EEPROM is an
actual technology but is not as robust as flash.
The 'F' is not the package type but rather just part of the Device
ID. 'F' Typically stands for flash when talking about EEPROMs but
not always. The package type will be some letters after the speed
value.
Fex. The AMD 29F040B-90JC I have here on my desk indicates it is a
90nS (the 90) 32Pin PLCC ( the J) that works in the commercial
temperature range (the C).
Search for '29F040' and pull down one of the .pdf datasheets that
show up. That will explain some stuff.
I suggest you snag a copy of a magazine called 'Circuit Cellar'
There will be some ads for programmers that are below the $1000 mark.
They may or may not program the parts you need. Be aware that you
are still going to spend $200 to $300 and what you get may be a piece
of crap. Some of the budget progarammers I have worked with really
sucked.
I may be a better idea for you to spend that $200 or so an buy an
emulator. Then you could play until you had everything perfect and
only have to do the hot swap once.
I've also heard that certain network cards can act as cheap
programmers but I haven't spoken with anyone who has done it.
--
Richard A. Smith Bitworks, Inc.
[EMAIL PROTECTED] 501.846.5777
Sr. Design Engineer http://www.bitworks.com
