93C56 Technical Data, x8(2k) Serial CMOS EEPROM Datasheet, buy 93C 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. GIANTEC 93 series EEPROM products work well under stable voltage within . KHz. Figure 8: The theoretically maximum SK frequency. 93C 93C

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Posted by nimaid in forum: Not to mention so many people in the jeep community have arduinos and would benefit from this. The errors are consistent and seem to happen with every bit value except FFFF. Well the good news is its a late model and I have everything I need from a junkyard for very cheap.

Nov 5, 19 0. Your name or email address: Jan 10, 2. I have checked the pins of the clip and they are all correct and if they weren’t it shouldn’t be able to write to the eeprom If this were a serial port I might try slowing down the bitrate, but this programmer seems to have no settings at all.

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. It won’t be easy, as they don’t want crooks ‘clocking’ the mileage.

The test clip works fine when writing data also. Please do not take anything for granted, the answer maybe dead simple but I’m just not seeing it.

You May Also Like: Jan 11, 3. TomGeorge Design and Repair of industrial control systems.

I would still like to know why it is able to write but not read? No, create an account now. I just figured why not try with my arduino and learn a thing or two. Do you already have an account?


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9c56 best guess is a flaky connection on one of the wire to pin connections at the back end of the clip. I have also tried 8dip versions of this eeprom in eeeprom same programmer and they never give errors so I must assume it is the clip.

Just as the title states I wish to flash a 93c56 EEPROM in my jeep cherokee gauge cluster because my old gauge cluster has 9356 and the new one will have incorrect millage on the odometer. It may be cheaper and less risky to go to a Cherokee dealer and get him to do it 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.

If I do go about pulling the code, is there a circuit that needs setup and any pre written code for this?

flashing a 93c56 EEPROM with arduino

The reviews for this clip dont mention this problem, and it is sold eepprom the same company that sells the programmer. Jan 10, 1. I am trying to read an Atmel 93C56B eeprom, so8 surface mount package, with this programmer. Everything runs on smoke, let the smoke out, it stops running Ill see what I can do about separating that chip.

Two different of those same efprom were tested However Using another 93c56 from another manufacturer gives no similar error.

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

Why is so8 test clip causing read errors with 93C56 eeprom (TL866 programmer)?

But not that easy. I actually did do some googling and most people either take it to the dealership or reflash it with an EEPROM flasher. 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!


This is why we test Posted by nsaspook in forum: Discussion in ‘ Embedded Systems and Microcontrollers ‘ started by cdsJan 10, When using the so8 adapter in the zif socket it works perfectly.

Is weprom a connector next to this chip which does this? I just wonder if moving the chip might be a solution. However when I use the test clipit is giving me read errors on every other bit. This is what it should look like: Why is using a battery causing my ATtiny85 to malfunction? Is this something the arduino can handle? There must be a procedure to clone the new cluster from the old. But what is the format of the data? Use this tutorial to get your FPGA development environment setup and understand the tool set and basic development process.

I’ll look into that cloning. And here are a few other bit values, spliced together to save space In every case except FFFFthe even numbered bits 0,2,4, Hi, What do the professionals do when eerpom need to change instrument cluster?

Embedded Systems and Microcontrollers.

Why is so8 test clip causing read errors with 93C56 eeprom TL programmer? Quote of the day. I’ll see if I can find 9c356 old bitbasher – but given the datasheet you could figure it out.

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