PDA

View Full Version : Eprom ECU Q's

Pages : 1 [2]
niterydr
10-17-2005, 10:47 PM
Blank chip? $5.
LightningGSX
10-25-2005, 10:52 PM
Sounds like the used a larger EPROM and just grounded the top address lines.If you do it this way, you can use multiple images, its basically a hack way of making it possible to change code on the fly.

If you want chips, buy them from Digikey, they are $1.14 part#AT27C256R-70PI.I have about 50 if you want to pick some up.
Jepherz
11-09-2005, 04:37 PM
^^With him.

Only half of the stock eprom is written to, so even with its small size of 64k, you could still get multiple images onto it. You can get the eprom in the same pin configuration and just ground 1 or 2 pins to jump to a whole different image.

If you're looking for sweet features, check out http://www.dsmchips.com/. Jeff Rules!