Editing Peripheral Interface Adapter (section)

{{Short description|Input/output chip for 8-bit microprocessors}}
[[File:Motorola MC6820L MC6821L.jpg | thumb|right | Motorola MC6820 and MC6821 Peripheral Interface Adapters]]
A '''Peripheral Interface Adapter''' (PIA) is a [[peripheral]] [[integrated circuit]] providing parallel I/O interfacing for [[microprocessor]] systems.
[[File:MOS 6520.jpg | thumb|right | MOS 6520]]
<div class="floatright" style="border: 1px solid #828991;background-color: #f8f9fa;padding:0.2em;font-size:88%;color:red;">
{{center|{{font color|black|'''''PIA pin configuration'''''}}}}
{{resize|80%|{{Pre|{{font color|#626971|&nbsp;   ┌─────⊔︀─────┐
Vss ┤ 1       40├ CA1
PA0 ┤ 2       39├ CA2
PA1 ┤ 3       38├ !IRQA
PA2 ┤ 4       37├ !IRQB
PA3 ┤ 5       36├ RS0
PA4 ┤ 6       35├ RS1
PA5 ┤ 7       34├ !RES
PA6 ┤ 8       33├ D0
PA7 ┤ 9       32├ D1
PB0 ┤10       31├ D2
PB1 ┤11       30├ D3
PB2 ┤12       29├ D4
PB3 ┤13       28├ D5
PB4 ┤14       27├ D6
PB5 ┤15       26├ D7
PB6 ┤16       25├ E
PB7 ┤17       24├ CS1
CB1 ┤18       23├ !CS2
CB2 ┤19       22├ CS0
Vcc ┤20       21├ R/!W
    └───────────┘}}}}}}
</div>