Flashing GM PCM - 32-Bit Motorola 6833X

This talks about BDM used on card Engine computer
durahax
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Joined: Fri Jun 01, 2012 10:30 am

Post by durahax »

usbbdm wrote:When I got the 411 from the member, he emailed me the diagram. I have since rebuild my PC and that email cannot be found. I am sure I was able to detect the flash and got the dump. If I was right, there was a wathcdog and I have to act fast and read several round to get the flash dump.
Well I can't even identify at this point. So your saying watchdog will kick me out of BDM!? Or just prevent me from entering BDM altogether? So I want to reset the ECM power and try immediately after or something like that? I seen something in the data sheet saying it needed to reset twice and have signal going to one of the pins. You don't remember off hand where you made your connection? I don't care about the exact location of each wire. I think you would remember connecting to the MCU the pitch is so small. What did the 411 identify as in USBJTAG?
usbbdm
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Joined: Mon Jul 18, 2005 9:33 pm

Post by usbbdm »

I have spent some time recently on ECU411. After I enabled the write to the block of address of 0000, I still cannot read the "identification" from the chip. Either the data bus is swapped or the WE# signal is not wired. In order to program the chip, we also need to raise the VPP to 12V. That should not be too hard. The first thing to do is to find out why we cannot get the CUI working. The flash it uses is AB28F400B5. The datasheet found is only for A28F400BX.
Decryptor
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Joined: Thu Nov 29, 2007 10:08 pm

Post by Decryptor »

ANy update? I saw the video, did you get read and write working?

Would like to revisit this project!
usbbdm
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Joined: Mon Jul 18, 2005 9:33 pm

Post by usbbdm »

Munchies wrote:ANy update? I saw the video, did you get read and write working?

Would like to revisit this project!
ECU411 is fully working. With read and write.
Decryptor
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Joined: Thu Nov 29, 2007 10:08 pm

Post by Decryptor »

How about the 411's big brother.
Same mainboard different processor and added a 1mb flash.

AM29f800bb flash
18512202407 cpu
supposedly same cpu as 411 but faster

board has same pinout on the diag pad
usbbdm
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Joined: Mon Jul 18, 2005 9:33 pm

Post by usbbdm »

Munchies wrote:How about the 411's big brother.
Same mainboard different processor and added a 1mb flash.

AM29f800bb flash
18512202407 cpu
supposedly same cpu as 411 but faster

board has same pinout on the diag pad
Should work with a little or no tweak.
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