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82371AB PCI-TO-ISA / IDE XCELERATOR (PIIX4)
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Supported Kits for both Pentium and ® Pentium II Microprocessors 82430TX ISA Kit 82440LX ISA/DP Kit Multifunction PCI to ISA Bridge Supports PCI at 30 MHz and 33 MHz Supports PCI Rev 2.1 Specification Supports Full ISA or Extended I/O (EIO) Bus Supports Full Positive Decode or Subtractive Decode of PCI Supports ISA and EIO at 1/4 of PCI Frequency Supports both Mobile and Desktop Deep Green Environments 3.3V Operation with 5V Tolerant Buffers Ultra-low Power for Mobile Environments Support Power-On Suspend, Suspend to RAM, Suspend to Disk, and SoftOFF System States All Registers Readable and Restorable for Proper Resume from 0.V Suspend Power Management Logic Global and Local Device Management Suspend and Resume Logic Supports Thermal Alarm Support for External Microcontroller Full Support for Advanced Configuration and Power Interface (ACPI) Revision 1.0 Specification and OS Directed Power Management Integrated IDE Controller Independent Timing of up to 4 Drives PIO Mode 4 and Bus Master IDE Transfers up to 14 Mbytes/sec Supports “Ultra DMA/33” Synchronous DMA Mode Transfers up to 33 Mbytes/sec
© INTEL CORPORATION 1997 April 1997
Integrated 16 x 32-bit Buffer for IDE PCI Burst Transfers Supports Glue-less “Swap-Bay” Option with Full Electrical Isolation
Enhanced DMA Controller Two 82C37 DMA Controllers Supports PCI DMA with 3 PC/PCI Channels and Distributed DMA Protocols (Simultaneously) Fast Type-F DMA for Reduced PCI Bus Usage Interrupt Controller Based on Two 82C59 15 Interrupt Support Independently Programmable for Edge/Level Sensitivity Supports Optional I/O APIC Serial Interrupt Input Timers Based on 82C54 System Timer, Refresh Request, Speaker Tone Output USB Two USB 1.0 Ports for Serial Transfers at 12 or 1.5 Mbit/sec Supports Legacy Keyboard and Mouse Software with USB-based Keyboard and Mouse Supports UHCI Design Guide SMBus Host Interface Allows CPU to Communicate Via SMBus Slave Interface Allows External SMBus Master to Control Resume Events Real-Time Clock 256-byte Battery-Back CMOS SRAM Includes Date Alarm Two 8-byte Lockout Ranges Microsoft Win95* Compliant 324 mBGA Package
Order Number: 290562-001
4/9/97 2:23 PM PIIX4aDS
INTEL CONFIDENTIAL (until publication date)
82371AB (PIIX4)
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The 82371AB PCI ISA IDE Xcelerator (PIIX4) is a multi-function PCI device implementing a PCI-to-ISA bridge function, a PCI IDE function, a Universal Serial Bus host/hub function, and an Enhanced Power Management function. As a PCI-to-ISA bridge, PIIX4 integrates many common I/O functions found in ISA-based PC systems—two 82C37 DMA Controllers, two 82C59 Interrupt Controllers, an 82C54 Timer/Counter, and a Real Time Clock. In addition to compatible transfers, each DMA channel supports Type F transfers. PIIX4 also contains full support for both PC/PCI and Distributed DMA protocols implementing PCI-based DMA. The Interrupt Cont.