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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93C56 Datasheet(PDF) – ATMEL Corporation

I know this guy here did it with an off the shelf programmer, which is quite expensive compared to the arduino I all ready own. Is there a connector next to this chip which dataheet this?

Well the good news is its a late model and I have everything I need from a junkyard for very cheap. I’ll see if I can find my old bitbasher – but given the datasheet you could figure it out. It may be cheaper and less risky to go to a Cherokee dealer and get him to do it I just wonder if moving the chip might be a solution. I actually did do some googling and most people either take it to the dealership or reflash it with an EEPROM flasher.


TomGeorge Design and Repair of industrial control systems. But what is the format of the data? Just as the title states I wish to flash a 93c56 EEPROM datasheer my jeep cherokee gauge cluster because my old gauge cluster has malfunctioned and the new one will have incorrect millage on the odometer.

I just figured why not try with my arduino and learn a thing or two. Ill see what I can do about separating that chip. And if so how would I go about doing this? It won’t be easy, as they don’t want crooks ‘clocking’ the fatasheet. Everything runs on smoke, let the smoke out, it stops running Is this something the arduino can handle?

National Semiconductor

Not to mention so many people in the jeep community have arduinos datasheet would benefit from this. Hi, What 93c5 the professionals do when they need to change instrument cluster? 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!


No clue how do I go about getting this info? There must be a procedure to clone the new cluster from the old.

93C56 Datasheet

But not that easy. I’ll look into that cloning. If I do go about pulling the code, is there a circuit that needs setup and any pre written code for this?

Writing to the eeprom isn’t too hard if you have access to the pins.

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.