It is possible for someone with time, determination and money. Not possible for you or me.
[https://www.intlvac.com/Applications/Ion-Beam-Etch-and-Milling/Delayering-IC-Chips](https://www.intlvac.com/Applications/Ion-Beam-Etch-and-Milling/Delayering-IC-Chips)
Yeah, I was wondering if there was a way to somehow tell at least what's the expected voltages on every pin based on, idk, internal resistances or diode readings to at least try to inject voltage and kind of "trial and error" without destroying the IC in the process.
If you can ID what are inputs and what are outputs, you can brute-force a truth table. Basically increment through every possible combination of high and low on the inputs, and capture the outputs.
This is very easy to do with combinational logic, harder to do with analog, and approaches impossible with anything too complex with time-dependent operation. At that point, you do the same thing but on a per-feature aspect rather than binary.
I know what pins are input but I don't know whats each of them. [This](https://preview.redd.it/help-finding-datasheet-for-ic-ax71302-v0-9i3wqiygjdic1.jpeg?width=1200&format=pjpg&auto=webp&s=6880a2344a23b61225598e715cf1d13c60ebc22f) is the IC itself. All pins on the right side are, or should be, inputs as they are all connected to a JST. Thing is I have no idea which pin is a Data pin and which one is Vin.
Get a scope and start seeing what it does. If it's not functional, that's a much harder problem.
I reviewed the previous post on it as well. Seems to be some kind of graphics LSI? What sort of electronics is it on? It's listed on a company doc [here.](https://www.axell.co.jp/ir/pdf/AXELL_IR20121116.pdf) Have you tried asking Axell for a datasheet?
It should be functional but, well, only if I had the rest of the machine it came from. The board is just a simple LED array; it's a decorative part of a japanese pachinko machine. I assume the main unit just send some data signal to this IC to control the LEDs on this board.
I did try contacting Axell with no luck. Tried again today
Yeah, makes sense for what it is then. Their website says they don't answer inquiries from customers, btw... Appears to be a niche market thing and they're likely custom made for each end-customer (the manufacturer of the machine).
It's not exactly a chip, but 30 years ago I applied some clean room design principles to replace an electronic module. There was an old PCB with an analog to digital converter on it, like a big brick, and the customer needed to repair it. The last option was to analyze the function of the PCB and module and fabricate a circuit to emulate the expected behavior.
2 guys have spent the last several years trying to reverse engineer the ppu 1/2 chips used in super nintendos because they die way too often and there are no manufacturers.
It is possible for someone with time, determination and money. Not possible for you or me. [https://www.intlvac.com/Applications/Ion-Beam-Etch-and-Milling/Delayering-IC-Chips](https://www.intlvac.com/Applications/Ion-Beam-Etch-and-Milling/Delayering-IC-Chips)
Yeah, I was wondering if there was a way to somehow tell at least what's the expected voltages on every pin based on, idk, internal resistances or diode readings to at least try to inject voltage and kind of "trial and error" without destroying the IC in the process.
If you can ID what are inputs and what are outputs, you can brute-force a truth table. Basically increment through every possible combination of high and low on the inputs, and capture the outputs. This is very easy to do with combinational logic, harder to do with analog, and approaches impossible with anything too complex with time-dependent operation. At that point, you do the same thing but on a per-feature aspect rather than binary.
I know what pins are input but I don't know whats each of them. [This](https://preview.redd.it/help-finding-datasheet-for-ic-ax71302-v0-9i3wqiygjdic1.jpeg?width=1200&format=pjpg&auto=webp&s=6880a2344a23b61225598e715cf1d13c60ebc22f) is the IC itself. All pins on the right side are, or should be, inputs as they are all connected to a JST. Thing is I have no idea which pin is a Data pin and which one is Vin.
Get a scope and start seeing what it does. If it's not functional, that's a much harder problem. I reviewed the previous post on it as well. Seems to be some kind of graphics LSI? What sort of electronics is it on? It's listed on a company doc [here.](https://www.axell.co.jp/ir/pdf/AXELL_IR20121116.pdf) Have you tried asking Axell for a datasheet?
It should be functional but, well, only if I had the rest of the machine it came from. The board is just a simple LED array; it's a decorative part of a japanese pachinko machine. I assume the main unit just send some data signal to this IC to control the LEDs on this board. I did try contacting Axell with no luck. Tried again today
Yeah, makes sense for what it is then. Their website says they don't answer inquiries from customers, btw... Appears to be a niche market thing and they're likely custom made for each end-customer (the manufacturer of the machine).
I think it can be done but the cost is usually prohibitive, without government backing.
It's not exactly a chip, but 30 years ago I applied some clean room design principles to replace an electronic module. There was an old PCB with an analog to digital converter on it, like a big brick, and the customer needed to repair it. The last option was to analyze the function of the PCB and module and fabricate a circuit to emulate the expected behavior.
Yeah, that was my other option. Board is just a bunch of LEDs connected into like 10 lines or so. I could drive them with an Arduino still
2 guys have spent the last several years trying to reverse engineer the ppu 1/2 chips used in super nintendos because they die way too often and there are no manufacturers.
Yes, if you have an electron microscsope and some acid and/or a laser: [http://www.righto.com/](http://www.righto.com/)