VT82C686A datasheet(3/5 Pages) ETC

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VT82C686A

Revision 1.1 April 15, 1999

-3-

Features

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• Voltage, Temperature, Fan Speed Monitor and Controller

− Five positive voltage (one internal), three temperature (one internal) and two fan-speed monitoring

− Programmable control, status, monitor and alarm for flexible desktop management

− External thermister or internal bandgap temperature sensing

− Automatic clock throttling with integrated temperature sensing

− Internal core VCC voltage sensing

− Flexible external voltage sensing arrangement (any positive supply and battery)

• Universal Serial Bus Controller

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

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

− Root hub and four function ports

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

− Legacy keyboard and PS/2 mouse support

• System Management Bus Interface

− Host interface for processor communications

− Slave interface for external SMBus masters

• Sophisticated PC98-Compatible Mobile Power Management

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

− ACPI v1.0 Compliant

− APM v1.2 Compliant

− CPU clock throttling and clock stop control for complete ACPI C0 to C3 state support

− PCI bus clock run, Power Management Enable (PME) control, and PCI/CPU clock generator stop control

− Supports multiple system suspend types: power-on suspends with flexible CPU/PCI bus reset options,

suspend to DRAM, and suspend to disk (soft-off), all with hardware automatic wake-up

− Multiple suspend power plane controls and suspend status indicators

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

− Normal, doze, sleep, suspend and conserve modes

− Global and local device power control

− System event monitoring with two event classes

− Primary and secondary interrupt differentiation for individual channels

− Dedicated input pins for power and sleep buttons, external modem ring indicator, and notebook lid open/close for

system wake-up

− Up to 12 general purpose input ports and 23 output ports

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

− One programmable chip select and one microcontroller chip select

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

− Thermal alarm on either external or any combination of three internal temperature sensing circuits

− Hot docking support

− I/O pad leakage control

• Plug and Play Controller

− PCI interrupts steerable to any interrupt channel

− Steerable interrupts for integrated peripheral controllers: USB, floppy, serial, parallel, audio, soundblaster, MIDI

− Steerable DMA channels for integrated floppy, parallel, and soundblaster pro controllers

− One additional steerable interrupt channel for on-board plug and play devices

− Microsoft Windows 98TM, Windows NTTM, Windows 95TM and plug and play BIOS compliant

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