82344 ISA BUS CONTROLLER

This document is an advance information technical datasheet for the Intel 82344 ISA Bus Controller. The 82344 is a 160-pin integrated circuit designed for PC/AT-type systems using 386SX or 386DX processors.

Key functions provided by the controller include:

• DMA control with expanded memory range capabilities.
• Real-time clock (RTC) and support for an external RTC.
• Interrupt control (using 8259 megacells).
• Timer/counter functions.
• Slot bus refresh address generation.
• Port B logic.

The device features built-in "bus quiet" and power-saving sleep modes to support portable system requirements. It is implemented in 1.5-micron CMOS technology and supports CPU clock speeds up to 33 MHz. The document provides a detailed block diagram, pin-out configurations, and comprehensive signal descriptions, including CPU, system controller, ROM, bus, and peripheral interfaces.