INS8259 - National Semiconductor

INS8259 Programmable Interrupt Controller

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 ca.

Features

• Performs Priority Control of up to Eight Interrupt Levels
• Can be Expanded to Handle up to 64 Levels Through Cascading
• Four Programmable Operating Modes
• Programmable Interrupt Vectors, Allowing Service Routines to be Located Anywhere in Memory
• Interrupt Request Inputs Can be Individually Masked
• TRI-STATE@ TTL Drive Capability for Bidirectional Data and Control Buses
• Single + 5 Volt Power Supply
• 28-Pin Dual-in-Line Package
• MICROBUSTM
* Compatible INS8080 Family C~U Group to MICROBUS Configuration .r READY DP8224 CLOCK GENERATOR & DRIVER ¢1 RESET READY INS8080A MICRDPROCESSO.