[VIA Technologies, Inc]

PC97 COMPLIANT PCI-TO-ISA BRIDGE

WITH ACPI, DISTRIBUTED DMA, PLUG AND PLAY,

MASTER MODE PCI IDE CONTROLLER WITH ULTRADMA-33,

USB CONTROLLER, KEYBOARD CONTROLLER, AND REAL TIME CLOCK

• PC97 Compliant PCI to ISA Bridge

− Integrated ISA Bus Controller with integrated DMA, timer, and interrupt controller

− Integrated Keyboard Controller with PS2 mouse support

− Integrated DS12885-style Real Time Clock with extended 256 byte CMOS RAM and Day/Month Alarm for ACPI

− Integrated USB Controller with root hub and two function ports

− Integrated master mode enhanced IDE controller with enhanced PCI bus commands and UltraDMA-33 extensions

− PCI-2.1 compliant with delay transaction

− Eight double-word line buffer between PCI and ISA bus

− One level of PCI to ISA post-write buffer

− Supports type F DMA transfers

− Distributed DMA support for ISA legacy DMA across the PCI bus

− Fast reset and Gate A20 operation

− Edge trigger or level sensitive interrupt

− Flash EPROM, 2MB EPROM and combined BIOS support

− Programmable ISA bus clock

− Supports external IOAPIC interface for symmetrical multiprocessor configurations

• Inter-operable with VIA and other Host-to-PCI Bridges

− Combine with VT82C585VPX/587VP for a complete 75MHz 6x86 / PCI / ISA system (Apollo VPX)

− Combine with VT82C595 for a complete Pentium / PCI / ISA system (Apollo VP2)

− Combine with VT82C685/687 for a complete Pentium-Pro /PCI / ISA system (Apollo P6)

− Combine with VIA Apollo-AGP and Apollo Pro chipsets for new high-performance / enhanced-functionality systems

− Inter-operable with other Intel or non-Intel Host-to-PCI bridges for a complete PC97 compliant PCI/ISA system

• Enhanced Master Mode PCI IDE Controller with Extension to UltraDMA-33

− Dual channel master mode PCI supporting four Enhanced IDE devices

− Transfer rate up to 33MB/sec to cover PIO mode 4, multi-word DMA mode 2 drives, and UltraDMA-33 interface

− Sixteen levels (doublewords) of prefetch and write buffers

− Interlaced commands between two channels

− Bus master programming interface for SFF-8038i rev.1.0 and Windows-95 compliant

− Full scatter gather capability

− Support ATAPI compliant devices including DVD devices

− Support PCI native and ATA compatibility modes

− Complete software driver support

• Universal Serial Bus Controller

− USB v.1.0 and Intel Universal HCI v.1.1 compatible

− Eighteen level (doublewords) data FIFO with full scatter and gather capability

− Root hub and two function ports

− Integrated physical layer transceivers with over-current detection status on USB inputs

− Legacy keyboard and PS/2 mouse support

• Sophisticated PC97-Compatible Power Management

− Supports both ACPI (Advanced Configuration and Power Interface) and legacy (APM) power management

− ACPI v1.0 Compliant (all required features plus extensions for most efficient desktop power management)

− APM v1.2 Compliant

− Supports soft-off (suspend to disk) and power-on suspend with hardware automatic wake-up

− One idle timer, one peripheral timer and one general purpose timer, plus 24/32-bit ACPI compliant timer

− Dedicated input pin for external modem ring indicator for system wake-up

− Enhanced integrated real time clock (RTC) with date alarm, month alarm, and century field

− Normal, doze, sleep, suspend and conserve modes

− System event monitoring with two event classes

− Five multi-purpose I/O pins plus support for up to 16 general purpose input ports and 16 output ports

− I2C serial bus support for JEDEC-compatible DIMM identification and on-board-device power control

− Seven external event input ports with programmable SMI condition

− Primary and secondary interrupt differentiation for individual channels

− Clock throttling control

− Multiple internal and external SMI sources for flexible power management models

• Plug and Play Controller

− PCI interrupts steerable to any interrupt channel

− Three steerable interrupt channels for on-board plug and play devices

− Microsoft Windows 95TM and plug and play BIOS compliant

• Pin-compatible upgrade from VT82C586 and VT82C586A for existing designs

• Built-in Nand-tree pin scan test capability

• 0.5um mixed voltage, high speed and low power CMOS process

• Single chip 208 pin PQFP