T82C54M-2

Product Details

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[ 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