EISA SYSTEM COMPONENT (ESC)

This document describes both the 82374EB and 82374SB components. Unshaded areas describe the

82374EB. Shaded areas, like this one, describe the 82374SB operations that differ from the 82374EB.

The 82374SB also contains support for SMM power management

Integrates EISA Compatible Bus Controller

Translates Cycles Between EISA and ISA Bus

Supports EISA Burst and Standard Cycles

Supports ISA Zero Wait-State Cycles

Supports Byte Assembly/ is assembly for 8-, 16- and 32-Bit Transfers

Supports EISA Bus Frequency of up to 8.33 MHz

Supports Eight EISA Slots

Directly Drives Address, Data and Control Signals for Eight Slots

Decodes Address for Eight Slot Specific AENs

Provides Enhanced DMA Controller

Provides Scatter-Gather Function

Supports Type A, Type B, Type C (Burst), and Compatible DMA Transfer

Provides Seven Independently Programmable Channels

Integrates Two 82C37A Compatible DMA Controllers

Integrates the Functionality of two 82C59 Interrupt Controllers and two 82C54 Timers

Provides 14 Programmable Channelsfor Edge or Level Interrupts

Provides 4 PCI Interrupts Routible to any of 11 Interrupt Channels

Supports Timer Function for Refresh Request, System Timer, Speaker Tone, Fail Safe Timer, and CPU Speed Control

Advanced Programmable Interrupt Controller (APIC)

Multiprocessor Interrupt Management

Separate Bus For Interrupt Messages

5V CMOS Technology

82374SB System Power Management (Intel SMM Support)

Fast On/Off Support via SMI Generation Hardware Events, Software Events, EXTSMIÝ, Fast Off Timer, System Events

Programmable CPU Clock Control

Enables Energy Efficient Desktop Systems