Need help identifying PLCC44 ST device

[PhaseSeeker]

Hi, I'm trying to fix an old device (late '80s/early '90) which uses, on its digital logic board, an IC in a PLCC44 package which is marked with the ST logo and "ICWA B22WE9335". I can't find any datasheets nor even any mention of its existence anywhere on the internet. Does anyone know where I might find some info on it? Also, I think it might possibly be some kind of programmable logic device (it's hooked to a 6805 MCU's data/address busses and to some external latches) with a custom part number, if so, any idea which device it might actually be? None of the PAL/GALs I can find in the databooks uses a package with that many pins.

Thanks in advance

[Andrew Neil]

Show a good, clear photo of the device.

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@PhaseSeeker wrote:

I think it might possibly be some kind of programmable logic device

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Maybe from the WSI acquisition: 

https://www.electronicsweekly.com/news/archived/resources-archived/st-gains-memory-ip-with-wsi-acquisition-2000-09/ 

[PhaseSeeker]

Here's a picture,

[Andrew Neil]

It gets a mention here:

https://hackaday.io/project/181937-reverse-engineering-the-rotor

The author does, indeed, describe it as a custom chip.

[Peter BENSCH · Accepted solution]

@Andrew Neil well spotted, but this is a question of that author. 😉

@PhaseSeeker As mentioned be Andrew, this is a customised device to which and whose documents only the respective customer has access. I'm extremely sorry that nobody will be able to help you.

Regards
/Peter