Couldnt really find a section for this..
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Re: Couldnt really find a section for this..
Actually I may have mis-interpretted that write command. That may be for ram, and so im not sure how to the save on power off is implemented. I can see it could be built in to hardware, and if its not a native function of the chip I assume it would be but I have not seen the schematics.
I think some of the topwin programmers can do it, or I can find some other chinese ones that can, but I dont know where to get them
http://www.tootoo.com/s-ps/auto-program ... 58090.html
http://www.ec21.com/product-details/Atu ... 74149.html
There also appears to be a Xicor 24c44 which I dont know if its compatible part, but sounds similar... so many questions, not enough answers
I think some of the topwin programmers can do it, or I can find some other chinese ones that can, but I dont know where to get them
http://www.tootoo.com/s-ps/auto-program ... 58090.html
http://www.ec21.com/product-details/Atu ... 74149.html
There also appears to be a Xicor 24c44 which I dont know if its compatible part, but sounds similar... so many questions, not enough answers
Have you read the FAQ? For lots of information and links to significant threads see here: http://pcmhacking.net/forums/viewtopic.php?f=7&t=1396
Re: Couldnt really find a section for this..
If it helps i can take some high res shots of the board so you can look at traces.
just for s&g's tried reading with 93c46 and got this. The cluster has 348982km
just for s&g's tried reading with 93c46 and got this. The cluster has 348982km
- Attachments
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- VSL3Trip348982km.bin
- (128 Bytes) Downloaded 388 times
Re: Couldnt really find a section for this..
Ive got a topwin 2004 and it doesnt have 24c44 but has 24c32 and 24c64.
I remember a member dec head had a post about how he was reading/hacking these speedo units about a year ago .
Does anyone know what happened to dec_ head ,he used to post all the time and then dissapeared.
I remember a member dec head had a post about how he was reading/hacking these speedo units about a year ago .
Does anyone know what happened to dec_ head ,he used to post all the time and then dissapeared.
- VL400
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Re: Couldnt really find a section for this..
Both of my programmers dont support it So would need to be a pic/avr to read it like festy suggested. Would be interesting to get the MCU code out too
Re: Couldnt really find a section for this..
yeh i dont have pic or avr to try with. You'd have one VL?
Re: Couldnt really find a section for this..
Don't suppose the odometer reading might have been 247,000km instead of 350? Does it still work?The1 wrote:If it helps i can take some high res shots of the board so you can look at traces.
just for s&g's tried reading with 93c46 and got this. The cluster had 350,000km from memory
Edit - if your chip read worked, the data in the eeprom might look like this:
Code: Select all
00000000 ff ff ff ff ff ff 00 ff ff ff ff ff ff ff d3 2c |...............,|
00000010 00 00 00 00 00 00 25 da 00 00 00 00 00 00 09 f6 |......%.........|
00000020
Last edited by festy on Sat Jul 16, 2011 5:22 pm, edited 1 time in total.
Re: Couldnt really find a section for this..
yeh it was definatly in the 300,000km range last time i fired it up, yep it was working last time i used it, though i flogged the lcd driver board off it to fix another trip unit so i havn't had it powered up since. im happy to post this chip in an envelope to someone who can read it. As long as i get it back at some point. Or what pic/avr would i need to buy, if there not much i might get one to play with.
Re: Couldnt really find a section for this..
ive got another L3 cluster here somewhere i can prob get the chip off it to if need be.
Re: Couldnt really find a section for this..
318,750km sound familiar maybe?
- VL400
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Re: Couldnt really find a section for this..
Grab an arduino and have a play, will be able to have it read the data really easily. Would be good to read it, run it for a few kms and compare so the checksum can be worked out too.