VT8231 datasheet(10/132 Pages) ETC

10 / 132 page

VT8231

Preliminary Revision 0.8 October 29, 1999

-4-

Features

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• Voltage, Temperature, Fan Speed Monitor and Controller

− Five universal input channels for voltage or temperature sensing

− Two fan-speed monitoring channels

− Input channel for thermal diode in Intel™ high speed Pentium II™ / Pentium III™ CPUs

− 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)

• Sophisticated PC99-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

− 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 2000TM, Windows 98SETM, Windows 98TM, Windows NTTM, Windows 95TM and plug and play

BIOS compliant

• Built-in NAND-tree pin scan test capability

• 0.30um, 3.3V, low power CMOS process

• Single chip 27x27 mm, 376 pin BGA

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