VT82C596A

Revision 1.1 December 9, 1998

-3-

Overview

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The VT82C596 MPIPC (Mobile PCI Integrated Peripheral Controller) is a high integration, high performance, power-efficient, and

high compatibility device that supports Intel and non-Intel based processor to PCI bus bridge functionality to make a complete

Microsoft PC97-compliant PCI/ISA system. In addition to complete ISA extension bus functionality, the VT82C596 includes

standard intelligent peripheral controllers:

a) Master mode enhanced IDE controller with dual channel DMA engine and interlaced dual channel commands. Dedicated

FIFO coupled with scatter and gather master mode operation allows high performance transfers between PCI and IDE

devices. In addition to standard PIO and DMA mode operation, the VT82C596 also supports the UltraDMA-33 standard to

allow reliable data transfer rates up to 33MB/sec throughput. The IDE controller is SFF-8038i v1.0 and Microsoft Windows-

95 compliant.

b) Universal Serial Bus controller that is USB v1.0 and Universal HCI v1.1 compliant. The VT82C596 includes the root hub

with two function ports with integrated physical layer transceivers.

The USB controller allows hot plug and play and

isochronous peripherals to be inserted into the system with universal driver support. The controller also implements legacy

keyboard and mouse support so that legacy software can run transparently in a non-USB-aware operating system

environment.

c) Keyboard controller with PS2 mouse support.

d) Real Time Clock with 256 byte extended CMOS. In addition to the standard ISA RTC functionality, the integrated RTC also

includes the date alarm, century field, and other enhancements for compatibility with the ACPI standard.

e) Notebook-class power management functionality compliant with ACPI and legacy APM requirements. Multiple sleep states

(power-on suspend, suspend-to-DRAM, and suspend-to-Disk) are supported with hardware automatic wake-up. Additional

functionality includes event monitoring, CPU clock throttling and stop (Intel processor protocol), PCI bus clock stop control,

modular power, clock and leakage control, hardware-based and software-based event handling, general purpose I/O, chip

select and external SMI.

f) Full System Management Bus (SMBus) interface.

g) Distributed DMA capability for support of ISA legacy DMA over the PCI bus. PC/PCI and Serial IRQ mechanisms are also

supported for docking and non-docking applications.

h) Plug and Play controller that allows complete steerability of all PCI interrupts to any interrupt channel. Three additional

steerable interrupt channels are provided to allow plug and play and reconfigurability of on-board peripherals for Windows

95 compliance.

i) External IOAPIC interface for Intel-compliant symmetrical multiprocessor systems.

The VT82C596 also enhances the functionality of the standard ISA peripherals. The integrated interrupt controller supports both

edge and level triggered interrupts channel by channel. The integrated DMA controller supports type F DMA in addition to

standard ISA DMA modes. Compliant with the PCI-2.1 specification, the VT82C596 supports delayed transactions so that slower

ISA peripherals do not block the traffic of the PCI bus. Special circuitry is built in to allow concurrent operation without causing

dead lock even in a PCI-to-PCI bridge environment. The chip also includes eight levels (doublewords) of line buffers from the PCI

bus to the ISA bus to further enhance overall system performance.

CPU / Cache

CA

PCI

MD

MA/Command

CD

I2C (Module ID)

North Bridge

324 BGA

VT82C596

System Memory

Sideband Signals:

Init / CPUreset

IRQ / NMI

SMI / StopClk

FERR / IGNNE

USB

KBC

IDE

GPIO, Power Control, Reset

ISA

RTC

Crystal

Boot ROM

Expansion

Cards

Figure 1. PC System Configuration Using the VT82C596