6532

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MOS Technologies 6532 RAM-I/O-Timer "RIOT"

       +-----+--+-----+
   GND |1    +--+   40| A6
    A5 |2           39| Φ2
    A4 |3           38| CS1
    A3 |4           37| /CS2
    A2 |5           36| /RS
    A1 |6           35| R / /W
    A0 |7           34| /RESET
   PA0 |8           33| DB0
   PA1 |9    6532   32| DB1
   PA2 |10   RIOT   31| DB2
   PA3 |11          30| DB3
   PA4 |12          29| DB4
   PA5 |13          28| DB5
   PA6 |14          27| DB6
   PA7 |15          26| DB7
   PB7 |16          25| /IRQ
   PB6 |17          24| PB0
   PB5 |18          23| PB1
   PB4 |19          22| PB2
   Vdd |20          21| PB3
       +--------------+

Datasheet

Commodore Semiconductor Group NMOS 6532 (Memory, I/O, Timer Array)