SMSC EVB-EMC1002 - Manual (Page 7)

EVB-EMC1002/EMC1033 User Manual
SMSC EMC1002/EMC1033 Revision 1.1 (12-14-06)
7
4 Demo Description
4.1 Register 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.
4.2 Temperature 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:
..
Figure 4.1 Temperature History Plot
4.3 Temperature 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.