EMC2102 Standard Microsystems Corporation, EMC2102 Datasheet - Page 29

• Manufacturer Part Number: EMC2102
• Description: Rpm-based Fan Controller with HW Thermal Shutdown
• Manufacturer: Standard Microsystems Corporation

RPM-Based Fan Controller with HW Thermal Shutdown
Datasheet
SMSC EMC2102
5.7.3
HW_SHDN
Temperature
TP
Internal HW_SHDN Signal
The HW_SHDN output from the Critical/Thermal Shutdown Monitor is a logical indicator of the
temperature state of the chosen external diode channel. HW_SHDN is an internal signal routed as an
input to the Thermal / Critical Shutdown logic.
The HW_SHDN output is set to logic ‘1’ when the indicated temperature exceeds the temperature
threshold (T
consecutive measurements defined by the fault queue. If the HW_SHDN output is asserted and the
temperature drops below T
not defined
P
) established by the TRIP_SET input pin (as shown in
Temperature
Exceeds TP
Figure 5.5 HW_SHDN Operation
P
, then it will be set to a logic ‘0’ state.
DATASHEET
29
Measurements End
After 4
HW_SHDN set
th
measurement,
Figure
Temperature drops
5.5) for a number of
Revision 1.95 (10-19-06)
to TP or below