EVB-EMC1002/EMC1033 User Manual

4 Demo Description

4.1Register Manager Overview

The Register Manager application (RegMan) initially displays the main Help screen, where detailed description of the application’s features may be found. The Help screens can be displayed at any time by selecting Help from the menubar or pressing the ? button on the toolbar. RegMan enables the user to display temperature readings, set temperature limits and read/write configuration register values.

4.2Temperature History Graph

To open a Temperature History Graph window, select Plot -> Temperature History Plot from the menubar. The history plot continuously updates the temperature reported by the temp sensor. There are several display options, including which temperatures to display (internal, external, external2 for EMC1033 only), whether limits should be displayed, and if so, for which temp sensor. See a typical Temperature History Graph in Figure 4.1 below:

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Figure 4.1 Temperature History Plot

4.3Temperature Limits and Alert/Therm2, Addr/Therm Outputs

The high and low limits are displayed as dashed lines, initially with values set in the EMC1002.ini file. (or EMC1033.ini) These limits may be changed either in the register manager or by dragging the line on the history plot. If any of the Temp High or Temp Low Limits are exceeded, the Alert/Therm2 output will assert. If the Ext THERM Limit or the Local THERM Limit are exceeded, the Addr/Therm output will be asserted.

The Alert/Therm2 and Addr/Therm outputs are asserted active Low when a temperature exceeds the programmed limits. The state of these outputs can be monitored by the associated bi-color LEDs or test points on the PCB.

The Alert/Therm2 output pin can be configured to function as either an SMBus Alert output or as a Therm2 output. When configured as an SMBus Alert pin it will follow the SMBus Alert Response protocol to clear the assert state. When configured as a Therm2 output it will not require the SMBus Alert Response Protocol to clear the pin’s status. This pin is initialized as a Therm2 output by the EMC1002/1033.ini file. Change register 0x09 bit #5 to “0” to configure the pin function to Alert mode.

SMSC EMC1002/EMC1033

Revision 1.1 (12-14-06)

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