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