SMSC EVB-EMC2101 User Manual
EVB-EMC2101 User Manual
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SMSC EMC2101 1 Revision 1.5 (12-13-06)
1 Overview
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
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).
1.1 Related Documents
The CD included with the evaluation board contains the following documents:
n Evaluation Board Checklist
n Bill Of Materials
n Schematic
n Jumper Settings and Connector List
n Datasheet
n Chip Manager Application
n Register Definition File (EMC2101.xml)
EVB-EMC2101 User Manual
pin. In the Manual Configuration Mode, the device acts as an
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2 Getting Started
2.1 System Requirements
To use the EVB you will need:
n A PC running Windows 2000 or XP
n Display resolution 800x600 (or larger to view several windows simultaneously)
n An available USB port
2.2 Feature Summary
n Chip Manager (SMSC application) allows viewing and changing register values
n Graphing of any register
n Headers for connecting a remote diode or CPU/GPU thermal diode
n Resistance Error Correction verification
n Autonomous register loading via included EEPROM (EMC2101-R only)
n USB communication to evaluation board
n An external SMBus master may also be used via jumper settings
2.3 Installing the EVB
1. Install the Chip Manager (ChipMan) application and device driver on a PC by running Setup.exe
from the ChipMan distribution CD. A revision history and install/uninstall notes may be found in the
readme.txt file on the disk.
2. Connect the supplied USB cable to an available USB port on the PC. Plug the “mini-B” end of the
USB cable into EVB connector P6. The +3.3V and Bridge ACT LEDs should illuminate. After the
EVB is connected to the PC the “Find New Hardware” wizard will pop up for USB driver installation.
Follow the instructions in the readme.txt file to complete the installation process.
3. Start the EVB Software by selecting the Chip Manager application from the SMSC folder from the
Programs Windows Start menu. The EVB will initialize and the Chip Manager Quick Help screen
will appear as in Figure 2.1. The USBAct LED should be blinking when the Chip Manager is
running. For more help with ChipMan, select Help -> Contents for an html based help document
as shown in Figure 2.2.
Note: The SMSC ChipMan application allows viewing and changing register values for a variety of
EVBs including the EMC1001, EMC1002, EMC1023, EMC1033 and EMC2101. The ChipMan
software only needs to be installed once to support all of these EVBs. The list of supported
EVBs may be found in the pulldown menu under Options -> Select Device.
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EVB-EMC2101 User Manual
Figure 2.1 Chip Manager Quick Help Startup Screen
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