6522

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MOS Technology Versatile Interface Adapter (VIA)

    +-----+  +-----+
GND |1    +--+   40| CA1
PA0 |2           39| CA2
PA1 |3           38| RS0
PA2 |4           37| RS1
PA3 |5           36| RS2
PA4 |6           35| RS3
PA5 |7           34| /RES
PA6 |8           33| D0
PA7 |9           32| D1
PB0 |10          31| D2
PB1 |11   6522   30| D3
PB2 |12          29| D4
PB3 |13          28| D5
PB4 |14          27| D6
PB5 |15          26| D7
PB6 |16          25| Φ2
PB7 |17          24| CS1
CB1 |18          23| /CS2
CB2 |19          22| R/W
VCC |20          21| /IRQ
    +--------------+