Avalue EBM-CX700 User Manual
Page 20
EBM-CX700 Series
20 EBM-CX700 Series User’s Manual
1.6.4
VIA VT1211 Super I/O
The VT1211 is a full function Super I/O chip with 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 and PC99 system design guide" requirements and
is ACPI ready, and a hardware monitor engine is built in to monitor system health.
Key Features
•
LPC (Low Pin Count) Interface
—
Complies with Intel Low Pin Count Interface Specification Revision 1.0
—
Supports LDRQ#, SERIRQ protocols
•
Hardware Monitor Controller
—
Built-in 8-bit Analog to Digital Converter
—
One thermal input for Pentium II type thermal diode
—
1 intrinsic Vcc voltage monitor input
—
5 external Universal Channels for monitor inputs
—
Monitors 2 fan tachometer inputs
—
1 chassis open detection input
—
WatchDog comparison of all monitored values
—
Provides VID0 - VID4 support for P6 class CPU
—
Over temperature indicator output
—
Over limit of fan and voltage indicator output
—
Provides beep tone warning
—
Serial Bus slave mode supported
•
Fan Speed Controller
—
Provides fan on-off and speed control
—
Supports 2 programmable Pulse Width Modulation (PWM) outputs
—
Duty cycle resolution of 1/256
•
Flash-ROM Interface
—
Supports up to 4MB flash ROM
•
SmartGuardian Controller
—
Provides automatic temperature to fan speed control
—
Supports mix-and-match for temperature inputs and fan speed control outputs