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CDP1877C Datasheet Programmable Interrupt Controller (PIC)

Manufacturer: Intersil (now Renesas)

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General Description

The CDP1877 and CDP1877C are programmable 8-level interrupt controllers designed for use in CDP1800 series microprocessor systems.

They provide added versatility by extending the number of permissible interrupts from 1 to N in increments of 8.

When a high to low transition occurs on any of the PIC interrupt lines (IR0 to IR7), it will be latched and, unless the request is masked, it will cause the INTERRUPT line on the PIC and consequently the INTERRUPT input on the CPU to go low.

Overview

CDP1877, CDP1877C March 1997 Programmable Interrupt Controller.

Key Features

  • Compatible with CDP1800 Series.
  • Programmable Long Branch Vector Address and Vector Interval.
  • 8 Levels of Interrupt Per Chip.
  • Easily Expandable.
  • Latched Interrupt Requests.
  • Hard Wired Interrupt Priorities.
  • Memory Mapped.
  • Multiple Chip Select Inputs to Minimize Address Space Requirements Ordering Information.

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