SMSC EVB-EMC2101 User Manual

EVB-EMC2101 User Manual

Revision 1.5 (12-13-06)

SMSC EMC2101

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The EMC2101 is an environmental monitoring device with a selectable PWM or DAC fan driver output,
one external temperature monitoring channel and one internal temperature monitor. It contains
advanced circuitry to remove errors induced by series resistance and CPU thermal diode process
differences to provide accurate temperature measurements and accurate fan control.

The FAN output can be configured as a PWM (default) or DAC output. The PWM fan driver uses an
eight entry look up table to create a programmable temperature response. The DAC output provides
a linear drive for the system fan circuit using this same look up table.

Finally, the EMC2101-R has two configuration modes and two default fan settings based on the value
of the pull-up-resistor on the ALERT pin. In the Manual Configuration Mode, the device acts as an
SMBus client slave and waits to be configured by the system SMBus master. In the Automatic
Configuration mode, the device automatically queries the SMBus for an EEPROM device and uploads
configuration information from the EEPROM into its internal registers.

All of the modes and functions of the EMC2101 can be tested and observed with the EVB-EMC2101.
The EVB-EMC2101 is a USB-based platform for evaluating both EMC2101 packages (8-MSOP and
8-SOIC). 

The CD included with the evaluation board contains the following documents:

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Evaluation Board Checklist

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Bill Of Materials

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Schematic

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Jumper Settings and Connector List

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Datasheet

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Chip Manager Application

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Register Definition File (EMC2101.xml)