Avalue EBM-CX700 - 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
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Complies with Intel Low Pin Count Interface Specification Revision 1.0
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Supports LDRQ#, SERIRQ protocols
• Hardware Monitor Controller
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Built-in 8-bit Analog to Digital Converter
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One thermal input for Pentium II type thermal diode
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1 intrinsic Vcc voltage monitor input
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5 external Universal Channels for monitor inputs
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Monitors 2 fan tachometer inputs
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1 chassis open detection input
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WatchDog comparison of all monitored values
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Provides VID0 - VID4 support for P6 class CPU
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Over temperature indicator output
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Over limit of fan and voltage indicator output
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Provides beep tone warning
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Serial Bus slave mode supported
• Fan Speed Controller
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Provides fan on-off and speed control
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Supports 2 programmable Pulse Width Modulation (PWM) outputs
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Duty cycle resolution of 1/256
• Flash-ROM Interface
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Supports up to 4MB flash ROM
• SmartGuardian Controller
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Provides automatic temperature to fan speed control
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Supports mix-and-match for temperature inputs and fan speed control outputs