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Icecavern
20-02-2003, 08:12
Thought I'd start a new thread to move this out of the DV thread again...

Thanks for the answer Richard I had a look yesterday for the chip and 1000000 erase /program cycles should be sufficient even if it does write to a part of flash every time you change programs...

It's put my mind at ease now so I'll have to get the Leon booked in for an upgrade at some point... I'm still tempted to replace a few bits so I can run the same power as the golf at the RR day.. ( Sorry mate I've forgotten your name already :( )

Pete

Originally posted by Revo Richard
Ibiza or Leon non VVT= amd29f400bb
Leon VVT= amd29f800bb

Thats from memory so how sad am I?

The Revo software is uploaded/flashed once only and then the switching or changing of settings is done via the difference in look up tables. Cannot go in to this in great detail as it may give too much away (also I am not one of our software engineers). Our competitors would love to know how this works and it looks like there is one in the midst of this thread ;)

If VAG issue a software update it will be allowed to reflash over Revo but at this point no 1.8T engine in Europe has ever had a recall for software (hell, they won't even recall coil packs so imagine the software recall costs?) If this does happen in the future we will allow any Revo dealer to re-install the software FOC.

btw, we do happen to have one Test ECU that has been reflashed over 70 times and is still going strong.
Some BMW EEPROMS apparently have a limited flash life. Maybe one of you with the eeprom bible can give the details of the devices mentioned at the top?

m0rk
20-02-2003, 08:42
AM29F400BB & 800BB both have 1,000,000 writes/rewrites - I think you'll be OK!!

Just FYI, do you want me to send the datasheeets Richard?

Trog
21-02-2003, 23:04
I don't think u guys have anything to worry about.
Most ECU's (EMS) will write to EEPROM on every key cycle/drive cycle, during the power latch stage (time after key off where the ECU stays powered, for DTC writes, IMMO sync checks, Cooling fan run-on etc.....)
Any parameter changes that are made during the the drive cycle i.e. adaption changes may also be flashed upon key off (along with DTC's etc..). The changes are held in volatile CAL RAM (erased upon ECU power down) and then flashed to EEPROM (non-volatile) upon key-off during the power latch stage.

A project i've been working on (at work) ensures that the EEPROM will accept at least an equal amount of writes as the cycle lifetime of the key barrel - 750,000 or there abouts. Many EEPROM devices are rated at 1,000,000 flash cycles.

NO WORRIES.. go get REVO'd :jog:
:p

ADE
(Trog)