EMC1424 SMSC Corporation, EMC1424 Datasheet - Page 35

• Manufacturer Part Number: EMC1424
• Description: (EMC1423 / EMC1424) Temperature Sensor
• Manufacturer: SMSC Corporation

1°C Temperature Sensor with Hardware Thermal Shutdown
Datasheet
ADDR.
SMSC EMC1423/EMC1424
6.8
6.9
6.10
1Dh
ADDR.
ADDR.
1Bh
1Ah
19h
20h
21h
30h
R/W
R/W
Therm Limit Registers
External Diode Fault Register
Software Thermal Shutdown Configuration Register
R/W
R-C
R/W
R/W
R/W
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.
Configuration
REGISTER
Shutdown
Software
Thermal
REGISTER
Diode Fault
Internal Diode
THERM Limit
THERM Limit
THERM Limit
THERM Limit
External
REGISTER
Hysteresis
Table 6.11 Software Thermal Shutdown Configuration Register
External
External
External
Diode 1
Diode 2
THERM
Diode 3
B7
-
Table 6.10 External Diode Fault Register
B7
-
128
128
128
128
128
Table 6.9 Therm Limit Registers
B7
B6
-
B6
-
DATASHEET
B6
64
64
64
64
64
B5
-
B5
-
35
B5
32
32
32
32
32
B4
-
B4
-
B4
16
16
16
16
16
E3SYS
B3
E3FLT
B3
B3
8
8
8
8
8
E2SYS
B2
E2FLT
B2
B2
4
4
4
4
4
ESYS
E1FLT
B1
B1
2
2
2
2
2
B1
Revision 1.16 (03-15-07)
B0
INTSYS
1
1
1
1
1
B0
B0
-
DEFAULT
DEFAULT
(85°C)
(85°C)
(85°C)
(10°C)
(85°C)
DEFAULT
0Ah
55h
55h
55h
55h
00h
00h