BU3266 / BU3270 pinout
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Custom Nintendo PIO chip found in the New Famicom (HVC-101). This replace the U3 (139), and the U7/U8 (368).
.---v---.
GND -- |01 32| -- +5V
NC ?? |02 31| ?? NC
M2 -> |03 30| ?? NC
A15 -> |04 29| -> /ROMSEL
A14 -> |05 28| -> PPU /CE
A13 -> |06 27| -> CPU RAM /CE
P1-D0 -> |07 26| <- INV-2I
P0-D0 -> |08 25| -> INV-2O
P1-D1 -> |09 24| -> D0
P0-D1 -> |10 23| -> D1
P1-D2 -> |11 22| -> /INP0
+5v -- |12 21| -> /INP1
P1-D3 -> |13 20| -> D2
P1-D4 -> |14 19| -> D3
GND -- |15 18| -> D4
INV-1I -> |16 17| -> INV-1O
'-------'
Notes:
- INV-1I/O (16-17) = Audio Inverter
- INC-2I/O (25-26) = PA13 Inverter
