Piix4E (82371Eb) - HP X Class 500/550MHz Reference Manual

System Board
Chipset

PIIX4E (82371EB)

Table 2-3. PIIX4E (82371EB) Chip Features
Feature
Multifunction PCI to ISA Bridge, supports
• PCI at 30 MHz and 33 MHz.
• PCI Rev 2.1 Specification.
• Full ISA or Extended I/O (EIO) Bus.
• Full Positive Decode or Subtractive Decode
of PCI.
• ISA and EIO at of PCI F requency.
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.
• 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.
USB
• Two USB 1.0 Ports for Serial transfers at
12 or 1.5 Mbit/sec.
• Supports UHCI Design Guide.
42
Feature
Enhanced DMA Controller
• Two 82C37 DMA controllers.
• Supports PCI DMA
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
Edge/Level sensitivity.
• Supports Optional I/O APIC.
• Serial Interrupt Input.
Integrated IDE Controller
• Independent Timing of up to four 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.
• Integrated 16 x 32-bit buffer for IDE PCI
Burst transfers.
• Supports Glue-less "Swap-Bay".
• Option with Full Electrical Isolation.
Real Time Clock
• 256-byte battery-backed up CMOS SRAM.
• Includes Date Alarm.
• Two 8-byte Lockout Ranges.
with 3 PC/PCI
programmable for
Chapter 2