I have encountered a roadblock as I attempt to burn my first chip with the Burn 1 and the Flash and Burn interface.
I have a 746 ECM in a ’92 LO3 Camaro. I’ve successfully read the stock chip and saved the bin for latter manipulations. Right now, I just want to load that stock bin on a replacement 27SF512 chip to ensure I’m off on the right foot. I think it would be best if I document the exact steps I perform so that you might be able to tell me what I’m doing incorrectly.

• Place stock chip in Burn 1 and start Flash & Burn utility.
• Select 2732A (Read Only) the press <READ CHIP>
• <SAVE BUFFER TO FILE> Bytes written to file: 4096.
• Close Flash & Burn, remove stock chip and place 27SF512 in lower portion of BURN 1 with notch facing release handle. Restart Flash & Burn.
• Select 27SF512 in Chip list.
• <LOAD FILE TO BUFFER> select recently read file from stock chip. (4.00 KB)
• Verify “Chip Addressing” Start: 00F000 End: 00FFFF and “Buffer Addressing” start: 000000 End: 000FFF.
• Press <ERASE CHIP>
• Press <PROGRAM CHIP>
• Press <VERIFY CHIP W/BUFFER> Pass verification

All seems fine and good until I place the new chip in the ZIF on the ECM. Chip is oriented with the notch facing the handle, like the stock chip, and secure. Rapid blink on the SES light is the result. I can place the stock chip in the ZIF with it’s notch facing the handle, and it works fine.
I’ve lurked on this site searching through other posts and reading the sticky threads as well as reading the Moates info over and over… I’m still at a loss… I’m hoping it’s something simple I’m just missing.

So, I’m asking for a fresh mind with some experience to read this and offer their advice.

Thanks,

Troy

 

I think with the 512 chip, you have to do an offset type burn.
I have a life supply of the 256 so I don't know how to do it.
But I think that is problem.
You should search for that.

 

Confused
Sorta newbie

You say 4KB written to file.

Should'nt it be, (16KB) written to file.
Or is a 746ecm and 92 L03 camaro different animal?
Then put on chip with correct addressing

Later

 

Well, the file size was determined by the stock bin pulled off of the factory chip, with no alterations. Just read the chip, a quick save, then load into buffer for a test burn on a 512 chip. Also, bins located on the net for this application were found to be the same size and nearly identical in code.
As far as addressing/buffer parameters, my main resource was: http://www.moates.net/documentation.php?documentation_id=20.
Again, I appreciate any ideas and thoughts.

Thanks,
Troy
And yes... of course I'm a newb... look at my post count.

 

I thought the 746 used a 27C256 EPROM.

7747 definatly uses 2732.

If indeed it is a 2732 (will have 24 pins) you need one of these: http://www.moates.net/product_info.p...products_id=36

This is an adaptor to have the ECM read only the very end of the chip where the bin file will be placed.

*edit* I just looked it up here: http://www.cruzers.com/~ludis/c3xref.html 7746 is indeed a 2732, so you will need the adaptor I mentioned above.

*edit2* Here is the Moates documentation for the G2: http://www.moates.net/documentation....entation_id=10

 

Thanks Six, I do have that adapter as well. My adapter and ZIF is stacked as outlined on that page. Perhaps tomorrow I will be able to stare at it some more... something is bound to present itself.

Troy

 

From what I can tell everything you outlined in your first post is correct. Bin size, buffer addressing, offset, etc. Two items come to mind:

Double check the soldering of the G2, Zip, etc. The larger '512 chip uses some additional pins that the 2732 chip doesn't.

Then for testing purposes, burn the BIN into every position of the '512 chip. Change the Chip Addressing to start in the first 4K block (0000 - 0FFF). Then do each block with the same BIN (1000 - 1FFF, 2000 - 2FFF, etc).

See if that works.

RBob.

 

Thanks RBob, I’ll go back through the hardware next and triple check everything. The adapter puzzles me… it appears that the traces don’t alter the orientation of the pin layout in any way, does it just provide a dummy spot for the extra pins of the 512 to terminate?

Also, should I use the BIN stacker utility in Tuner-Pro to drop the BIN in every position of the chip?

Thanks again for wisdom,

Troy

 

You can use the stacker in TP.

The extra pins on the '512 are addressing lines. Plus the VCC (+5 v) pin is different. It is still the last pin, but it ends up being a different pin in the socket. The additional address lines just get pulled up to 5 v.

RBob.

 

When I said sorta newbie, was referring to myself.

Confused on the 4KB and 16KB chip bytes, as all the
chips I have,, 128/256/512 all have 16KB of data when
programmed
Can only read the 128 and not burn to though.

Still learning, but burning.

 

All is good jaykar, no worries!
I may self inflicted a slight hardware issue on the adapter… I’ll be able to continue with this project sometime this weekend when my new adapter arrives. (Thanks Moates, for the super quick order processing!)
I’ll post my progress success or not.
Thanks,
Troy

 

What did you do?

 

There are different sized bins for different ECMs.

ECMs that used the 2732 EPROM, use 4K bins.

ECMs, such as the 7730 and 7749 use 32K bins.

You can program the appropriate sized bin onto a larger chip and still use it. this is what is being discussed in this thread, using a 4K bin on a chip that can stor up to 64K worth of data.

 

I was in a rush this morning… tried to work on it when I really didn’t have time to… anyway, I managed to severe a leg or two off while hastily removing the adapter from the socket to verify orientation. After some mild cursing, I cleaned the coffee that I spilled, put the pieces gently down and went on my way to work.
Just goes to show… take your time and do it right.
Troy

 

Six Shooter,

So in the case of the 165 ECM there is 16KB of Data??

As all the chips I burn, 256/512 are programmed with
16KB.
As to the stacking and offset programing, understand that.


Thanks

 

Update: Replacement adapter and chips arrived several days ago, thanks Craig. Today I decided to start from scratch and completely reversed the previous installation. After removing residual solder and cleaning the board, I carefully installed the new adapter and ZIF. Not sure what the culprit ended up being, but we have success! It may very well have been bridged pins on the soldering job; the first attempt was completed using a rather blunt, pocket iron. To tell the truth, I really don’t care at this point because I can move on to the next task!
Thanks to all who offered assistance, it was valuable!

Regards,
Troy