EMC1423_12 Datasheet, PDF (36/51 Pages) SMSC Corporation – 1°C Temperature Sensor with Hardware Thermal Shutdown

6.8
Therm Limit Registers
1°C Temperature Sensor with Hardware Thermal Shutdown
Datasheet
Table 6.9 Therm Limit Registers
ADDR. R/W
REGISTER B7 B6 B5 B4
External
19h
R/W
Diode 1
128 64 32 16
THERM Limit
External
1Ah
R/W
Diode 2
128 64 32 16
THERM Limit
20h
R/W
Internal Diode
THERM Limit
128
64
32
16
21h
R/W
THERM
Hysteresis
128 64
32
16
External
30h
R/W
Diode 3
128 64 32 16
THERM Limit
B3 B2 B1 B0 DEFAULT
8
4
2
1
55h
(85°C)
8
4
2
1
8
4
2
1
8
4
2
1
8
4
2
1
55h
(85°C)
55h
(85°C)
0Ah
(10°C)
55h
(85°C)
6.9
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.
External Diode Fault Register
Table 6.10 External Diode Fault Register
ADDR.
R/W
REGISTER
B7
B6
B5
B4
B3
B2
B1
B0 DEFAULT
1Bh
R-C
External
Diode Fault
-
-
-
- E3FLT E2FLT E1FLT -
00h
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.
Revision 2.0 (08-10-12)
36
DATASHEET
SMSC EMC1423/EMC1424