82374SB

Features:

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 Disassembly for 8- 16- and 32-Bit Transfers
   -Supports EISA Bus Frequency of up to 833 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 Channels for 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
Provides High Performance Arbitration
   -Supports Eight EISA Masters and PCEB
   -Supports ISA Masters DMA Channels and Refresh
   -Provides Programmable Arbitration Scheme for Fixed Rotating or Combination Priority
Integrates Support Logic for X-Bus Peripherals
   -Generates Chip SelectsEncoded Chip Selects for Floppy and Keyboard Controller IDE Parallel Serial Ports and     General Purpose Peripherals
   -Provides Interface for Real Time Clock
   -Generates Control Signals for X-Bus Data Transceiver
   -Integrates Port 92 Mouse Interrupt and Coprocessor Error Reporting
Generates Non-Maskable Interrupts (NMI)
   -PCI System Errors
   -PCI Parity Errors
   -EISA Bus Parity Errors
   -Fail Safe Timer
   -Bus Timeout
   -Via Software Control
Provides BIOS Interface
   -Supports 512K Bytes of Flash or EPROM BIOS on the X-Bus
   -Allows BIOS on PCI
   -Supports Integrated VGA BIOS
82374SB System Power Management (Intel SMM Support)
   -Fast OnOff Support via SMI GenerationHardware Events Software Events EXTSMI Fast Off Timer System Events
   -Programmable CPU Clock Control
   -Enables Energy Efficient Desktop Systems
Only Available as Part of a Supported Kit
208-Pin QFP Package

 

Pinout




Specifications

Case TemperatureUnder Bias.................... .................-65to110
Storage Temperature..................................................- 65to150
SupplyVoltages with Respect toGround ...............-0.5VtoV_CC +0.5V
Voltage On Any Pin ................................................-05VtoV_CC+ 05V
Power Dissipation ..............................................0.70W fullyloaded
........................................................................0.55Wwith fourslots
                                                               WARNING
Stressing the device beyond the ''Absolute Maximum Ratings'' may cause permanent damage These are stress ratings only Operating beyond the ''Operating Conditions'' is not recommended and ex-tended exposure beyond ''Operating Conditions'' may affect reliability

 

Description

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 82374EBSB EISA System Component (ESC) provides all the EISA system compatible functions The ESC with the PCEB provide all the functions to implement an EISA-to-PCI bridge and EISA IO subsystem The ESC integrates the common IO functions found in today's EISA-based PC systems The ESC incorp- orates the logic for an EISA (master and slave) interface EISA bus controller enhanced seven channel DMA controller with scatter-gather support EISA arbitration 14 channel interrupt controller Advanced Programma-ble Interrupt Controller (APIC) five programmable timercounters and non-maskable-interrupt (NMI) control logic The ESC also integrates support logic to decode peripheral devices such as the Flash BIOS real time clock keyboardmouse controller floppy controller two serial ports one parallel port and IDE hard disk drive

The 82374SB also contains support for SMM power management