AAN EPROMs ..

[prj]

Access speed, not clock speed. I have found that even 200ns works fine.

[UrS4boy]

Dave, have you never seen an ECU inside?
The chips are both DIP-28

Yes, but I never counted pins, even when swapping chip sets.

Okay so 28 pins. But there are 40 ns, 60 ns, 80 ns, 120 ns, etc. versions of these chips. What is the minimum clock speed?

[prj]

Hmm...27C512 seems to come in a variety of pin no. and other configs. Which one is appropriate?

http://avnetexpress.avnet.com/store/...12&topSellers=

Dave, have you never seen an ECU inside?
The chips are both DIP-28

[rs200]

all I know it must have 28pin ...

[UrS4boy]

27c512 and 87c257.
Buy from ebay.

Hmm...27C512 seems to come in a variety of pin no. and other configs. Which one is appropriate?

http://avnetexpress.avnet.com/store/em/EMController/Memory/EPROM/_/N-100176?CMP=KNC-ExpressGooglePPC&HBX_OU=50&HBX_PK=M27C512&action=products&cat=1&catalogId=500201&cutTape=&inStock=&langId=-1&myCatalog=&proto=&regionalStock=&rohs=&storeId=500201&term=M27C512&topSellers=

[rs200]

sorry. I forget it..
do you have this 2 chips for sale? because I can't find 87c257 in my country.

[prj]

Mmm I have told you in the past.
87c257 is boost.

[rs200]

od Dmitri , but which one is for boost and for fuel ?
tnx

[prj]

27c512 and 87c257.
Buy from ebay.

[rs200]

hy all !

well I need to buy empty eproms to copy one chips.
so what kind of chips did I have to buy in "chip shop" ? what did I have to say to man i shop?

are chips for fuel and boost the same one?

THANKS
Igor