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Peripheral Interface Adapter
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<p>A Peripheral Interface Adapter (PIA) is a <a href="/facts/Peripheral/3lEBPE14">peripheral</a> <a href="/facts/Integrated_circuit/fjn6vg7C">integrated circuit</a> providing parallel I/O interfacing for <a href="/facts/Microprocessor/Fx9CaQht">microprocessor</a> systems. </p> <i>PIA pin configuration</i> ┌─────⊔︀─────┐ 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 └───────────┘