Product specifications

VT1211 LPC SuperIO and Hardware Monitor
Revision 1.0 January 8, 2002 -3- Overview
Technologies, Inc.
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OVERVIEW
The VT1211 is a full function Super I/O chip that provides the most commonly used legacy Super I/O functionality plus the latest
Hardware monitor initiatives. The device uses an LPC interface that complies with “LPC Interface Specification Revision 1.0”.
The VT1211 contains a Floppy Disk Controller, an IEEE-1284 Parallel Port interface, two 16C550-UART-based serial port
interfaces, a VFIR (Very Fast IR) Controller, a game port which supports 2 joysticks, a MIDI interface, and a 4M Flash-ROM
interface. The integrated Hardware Monitor Controller controls the speed of 2 fans, monitors 2 fan tachometers, and has a
Pentium II thermal diode and 5 Universal analog inputs for measuring voltage or temperature (by connecting external thermistors).
The VT1211 meets the “Microsoft£ PC98 & PC99 system design guide” requirements and is ACPI ready. The device requires a
48 MHz clock input and operates at 3.3V power supply.
The VT1211 consists of following logical devices. One high-performance 2.88MB floppy disk controller, with digital data
separator, which supports one 360K / 720K / 1.2M / 1.44M / 2.88M floppy disk drive; One multi-mode high-performance parallel
port featuring support for bi-directional Standard Parallel Port (SPP), Enhanced Parallel Port (EPP v1.7 and v1.9), and IEEE1284
compliant Extended Capabilities Port (ECP) protocols; Two 16C550 standard compatible enhanced UARTs perform
asynchronous communication; One VFIR interface compliant with IrDA; One MIDI interface; One game port with built-in 558
and buffer chips to support direct connect of 2 joysticks; One Hardware Monitor; and Seven GPIO ports (56 GPIO pins).
A hardware monitor engine is built in to monitor system health. An enhanced 8 bit ADC is built inside. This is exploited to
simultaneously monitor 8 analog voltages or thermal inputs. The thermal inputs can be defined independently as thermistor or
PentiumTM II thermal diode. Besides the ADC, the Hardware Monitor subsystem is also equipped with one chassis-open
detection and 5 VID inputs for PentiumTM II Vcore identification.
All logical devices can be individually enabled or disabled via software configuration registers.