NM93C56MN – ?HQS=TI-null-null- dscatalog-df-pf-null-wwe. NMC93C56 – ?. 93c56 EEPROM are available at Mouser Electronics. Mouser offers inventory, pricing, & datasheets for 93c56 EEPROM. Three-wire. Serial. EEPROM. 1K ( x 8 or 64 x 16). AT93C Note: Not recommended for new design; please refer to. AT93C46D datasheet.

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But what is the format of the data? I just wonder if moving the chip might be a solution. Ill see what I can do about separating that chip. Well the good news is its a late model and I have everything I need from a junkyard for very cheap. I actually did do some googling and most darasheet either take it to the dealership or reflash it with an EEPROM flasher.

National Semiconductor – datasheet pdf

It may be cheaper and less risky to go to a Cherokee dealer and get him to do it It won’t be easy, as they don’t want crooks ‘clocking’ the mileage. No clue how do I go about getting this info? I know this guy here did datashwet with an off the shelf programmer, which is quite expensive compared to the arduino I all ready own.


Hi, What do the professionals do when they need to change instrument cluster? There must be a procedure to clone the new cluster from the old. Not to mention so many people in the jeep community have arduinos and would benefit from this.

Datasheeh just figured why not try with my arduino and learn a thing or two. Given that it’s ‘in-circuit’- I presume soldered – you’ll probably need to break the leads to CS, SK ,DI DO, so as to prevent the existing curcuitry from preventing your operations. Just as the title states I wish to flash a 93c56 EEPROM in my jeep cherokee gauge cluster because my old gauge cluster has malfunctioned and the new one will have incorrect millage on the odometer.

And if so how would I go about doing this? TomGeorge Design and Repair of industrial control systems. Everything runs on smoke, let the smoke out, it stops running I’ll see if I can find my old bitbasher – but given the datasheet you could figure it out.


National Semiconductor

If I do go about pulling the code, is there a circuit that needs setup and any pre written code for this? If you had the appropriate sw from the manufacturer I bet you could do this via the OBDII connector – but I also bet they’re not telling you how! Is this something the arduino can handle? Writing to the eeprom isn’t too hard if you have access to the pins.

I’ll look into that cloning.

But not that easy. Is there a connector next to this chip which does this?