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.
●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 Soft OFF System States
● All Registers Readable and Restorable for Proper Resume from 0.V Suspend
●Power Management Logic
● Global and Local Device Management
● 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
● 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
