joseph what chip do i use?
0.0 BAR
Joined: Feb 2003
Posts: 0
Re:joseph what chip do i use?
Those seem like good prices for flash proms.
FYI, the "C" in 29C256 means it's 5v standard memory.
There's a bit of disagreement on what speed memory you should get... I've got a pile of 200ns PROMS that work fine, but other people get CEL 0's because 200ns memory isn't fast enough. I think it's that it would be more expensive to make a bunch of different speed memory, so the company that made the 200ns chips I have just made a big batch of 120 or 150 ns chips and stamped them all whatever.
For safety sake, you want 150 ns or faster.
FYI, the "C" in 29C256 means it's 5v standard memory.
There's a bit of disagreement on what speed memory you should get... I've got a pile of 200ns PROMS that work fine, but other people get CEL 0's because 200ns memory isn't fast enough. I think it's that it would be more expensive to make a bunch of different speed memory, so the company that made the 200ns chips I have just made a big batch of 120 or 150 ns chips and stamped them all whatever.
For safety sake, you want 150 ns or faster.
0.0 BAR
Joined: May 2003
Posts: 30
Re:joseph what chip do i use?
hey guys, I have a 1989 honda CRX si and I have no idea what model my ecu is in the car, I am thinking that it is a PM6 but am not sure. I am also really interested in the ghettodyne system, and am not sure what or where i purchase the 28 pin EEPROM Socket, a couple of EEPROMs (ATMEL AT29C256)
I think, 1 TTL to RS232 converter. (For serial communications) , and the rest of the kit. And where do I get the EEPROM's programmed? Sorry for writing this essay but I am not really willing to buy an MSD 6BTM unit and a FMU. Thnak you for your help
I think, 1 TTL to RS232 converter. (For serial communications) , and the rest of the kit. And where do I get the EEPROM's programmed? Sorry for writing this essay but I am not really willing to buy an MSD 6BTM unit and a FMU. Thnak you for your help
3.0 BAR
Joined: Dec 2002
Posts: 3,829
Re:joseph what chip do i use?
TurboCRX, scroll through the threads in this forum, you'll find your answers plus alot more. 
Joseph, how can I tell (via part#) if a 29c256 is a rewritable eeprom? Finding prices from $13-$3ish, I ASSume the higher priced ones are the rewritables. Enlighten us.
Joseph, how can I tell (via part#) if a 29c256 is a rewritable eeprom? Finding prices from $13-$3ish, I ASSume the higher priced ones are the rewritables. Enlighten us.
3.0 BAR
Joined: Apr 2003
Posts: 2,260
Re:joseph what chip do i use?
Graham's (MR_DR_PEP) link is where I got mine. They work great.
why not 29c512 so you have the option of switching between two bins
That's actually been discussed. Recently on PGMFI..
http://pgmfi.hybridgarage.com/phorum...=256#reply_256
Originally Posted by XDEep
why not 29c512 so you have the option of switching between two bins
http://pgmfi.hybridgarage.com/phorum...=256#reply_256
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