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MAudio with faulty microcontroller

I got a MAudio keyboard that runs the Dream SAM9708 DSP and possibly another IC named ST PI12 that seems to be a microcontroller. The STPI12 is unresponsive.

ST has a series of microcontroller but seems non match what could be the VSS and VCC of the STPI12.

Do anyone here know if it is possible to find an equivalent IC for the ST PI12?
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