[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