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~National
~ Semiconductor
Preliminary
JULY 1978
INS8259 Programmable Interrupt Controller
General Description
The INS8259 is a Programmable Interrupt Controller chip contained in a standard 28-pin dual-in-Iine package_ The chip, which is fabricated using N-channel silicon gate technology, functions as a versatile interrupt management device in a microcomputer system.
Each INS8259 resolves interrupt requests from up to eight different sources. These devices can be cascaded to provide interrupt management of up to 64 levels with no other circuitry required.
The INS8259 minimizes software and real time overhead when handling multi-level priority interrupts. Its four operating modes allow the device to satisfy diverse system requirements.
INS8259 Datasheet
