| Vss | --- | 1 | ---6532--- | 40 | <-- | a6 |
| a5 | --> | 2 | 39 | <-- | ph2 | |
| a4 | --> | 3 | 38 | <-- | cs | |
| a3 | --> | 4 | 37 | <-- | !cs | |
| a2 | --> | 5 | 36 | <-- | !rs | |
| a1 | --> | 6 | 35 | <-- | r/!w | |
| a0 | --> | 7 | 34 | <-- | !rst | |
| pa0 | <-> | 8 | 33 | <-> | d0 | |
| pa1 | <-> | 9 | 32 | <-> | d1 | |
| pa2 | <-> | 10 | 31 | <-> | d2 | |
| pa3 | <-> | 11 | 30 | <-> | d3 | |
| pa4 | <-> | 12 | 29 | <-> | d4 | |
| pa5 | <-> | 13 | 28 | <-> | d5 | |
| pa6 | <-> | 14 | 27 | <-> | d6 | |
| pa7 | <-> | 15 | 26 | <-> | d7 | |
| pb7 | <-> | 16 | 25 | --> | !irq | |
| pb6 | <-> | 17 | 24 | <-> | pb0 | |
| pb5 | <-> | 18 | 23 | <-> | pb1 | |
| pb4 | <-> | 19 | 22 | <-> | pb2 | |
| Vcc | --- | 20 | 21 | <-> | pb3 |