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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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No clue how do I go about getting this info?

93C56 Datasheet

Ill see what I can do about separating that chip. But what is the format of the data? If I do go about pulling the code, is there a circuit that needs setup and any pre written code for this? Just as the title states Datashwet wish to flash a 93c56 EEPROM in my jeep cherokee gauge cluster because my old gauge cluster has malfunctioned and datashret new one will have incorrect millage on the odometer.

I’ll see if I can find my old bitbasher – but given the datasheet you could figure it out. Is there a connector next to this chip which does this?


And if so how would I go about doing this? Is this something the arduino can handle?

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! I’ll look into that cloning.

flashing a 93c56 EEPROM with arduino

Not to mention so many people in the jeep community have arduinos and would benefit from this. It won’t be easy, as they don’t want crooks ‘clocking’ the mileage.

But not that easy. Writing to the eeprom isn’t too hard if you have access to the pins.

Well the good news is its a late model and I have everything I need from a junkyard for very cheap. Hi, What do the professionals do when they need to change instrument cluster? Everything runs on smoke, let the smoke out, datadheet stops running I 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.

I actually did do some datxsheet and most people either take it to the dealership or reflash it with an EEPROM flasher. It may be cheaper and less risky to go to a Cherokee dealer and get 93c5 to do it There must be a procedure to clone the new cluster from the old.

(PDF) 93C56 Datasheet download

I just wonder if moving the chip might be a solution. TomGeorge Design and Repair of industrial control systems. I 93d56 this guy here did it with an off the shelf programmer, which is quite expensive compared to the arduino I all ready own.