EMC1423-1-AIZL-TR SMSC, EMC1423-1-AIZL-TR Datasheet - Page 36

• Manufacturer Part Number: EMC1423-1-AIZL-TR
• Description: Board Mount Temperature Sensors TRIPLE TEMP SNSR
• Manufacturer: SMSC

Specifications of EMC1423-1-AIZL-TR

• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

ADDR.
1Dh
Revision 1.36 (07-02-09)
ADDR.
6.9
6.10
1Bh
ADDR.
30h
R/W
R/W
R-C
R/W
R/W
R/W
The THERM Limit Registers are used to determine whether a critical thermal event has occurred. If
the measured temperature exceeds the THERM Limit, then the SYS_SHDN pin will be asserted (if the
corresponding measurement channel is linked to the SYS_SHDN pin). The limit setting must match
the chosen data format of the temperature reading registers.
The External Diode Fault Register indicates which of the external diodes caused the FAULT bit in the
Status Register to be set. This register is cleared when it is read.
Bit 3 - E3FLT - This bit is set if the External Diode 3 channel reported a diode fault.
Bit 2 - E2FLT - This bit is set if the External Diode 2 channel reported a diode fault.
Bit 1 - E1FLT - This bit is set if the External Diode 1 channel reported a diode fault.
The Software Thermal Shutdown Configuration Register controls whether any of the software channels
will assert the SYS_SHDN pin. If a channel is enabled, the temperature is compared against the
corresponding THERM Limit. If the measured temperature exceeds the THERM Limit, then the
SYS_SHDN pin is asserted. This functionality is in addition to the Hardware Shutdown circuitry.
Bit 3 - E3SYS - configures the External Diode 3 channel to assert the SYS_SHDN pin based on it’s
respective THERM Limit.
Bit 2 - E2SYS - configures the External Diode 2 channel to assert the SYS_SHDN pin based on it’s
respective THERM Limit.
External Diode Fault Register
Software Thermal Shutdown Configuration Register
Configuration
REGISTER
Shutdown
Software
Thermal
‘0’ (default) - the External Diode 3 channel is not linked to the SYS_SHDN pin. If the temperature
exceeds it’s THERM Limit, the E3THERM status bit is set but the SYS_SHDN pin is not asserted.
‘1’ - the External Diode 3 channel is linked to the SYS_SHDN pin. If the temperature exceeds it’s
THERM Limit, the E3THERM status bit is set and the SYS_SHDN pin is asserted. It will remain
asserted until the temperature drops below it’s THERM Limit minus the THERM Hysteresis.
Diode Fault
REGISTER
External
THERM Limit
REGISTER
Table 6.11 Software Thermal Shutdown Configuration Register
External
Diode 3
B7
-
Table 6.9 Therm Limit Registers (continued)
B7
-
Table 6.10 External Diode Fault Register
128
B6
B7
-
B6
-
DATASHEET
B6
64
B5
-
B5
-
36
B5
32
B4
-
B4
-
1°C Temperature Sensor with Hardware Thermal Shutdown
B4
E3SYS
16
B3
E3FLT
B3
B3
8
E2SYS
B2
E2FLT
B2
B2
4
ESYS
E1FLT
B1
B1
2
B1
SMSC EMC1423/EMC1424
B0
1
INTSYS
B0
-
B0
DEFAULT
(85°C)
Datasheet
DEFAULT
55h
00h
DEFAULT
00h