EMC1422 SMSC Corporation, EMC1422 Datasheet - Page 34

• Manufacturer Part Number: EMC1422
• Description: 1C Temperature Sensor
• Manufacturer: SMSC Corporation

ADDR.
Revision 1.16 (03-15-07)
6.15
6.16
6.17
37h
ADDR.
ADDR.
36h
40h
R/W
R-C
Low Limit Status Register
THERM Limit Status Register
Filter Control Register
R/W
R-C
The Low Limit Status Register contains the status bits that are set when a temperature channel drops
below the low limit. If any of these bits are set, then the LOW status bit in the Status Register is set.
Reading from the Low Limit Status Register will clear all bits. Reading from the register will also clear
the LOW status bit in the Status Register.
The ALERT pin will be set if the programmed number of consecutive alert counts have been met and
any of these status bits are set.
The status bits will remain set until read unless the ALERT pin is configured as a comparator output
(see
Bit 1 - ELOW - This bit is set when the External Diode channel drops below its programmed low limit.
Bit 0 - ILOW - This bit is set when the Internal Diode channel drops below its programmed low limit.
The THERM Limit Status Register contains the status bits that are set when a temperature channel
THERM Limit is exceeded. If any of these bits are set, then the THERM status bit in the Status Register
is set. Reading from the THERM Limit Status Register will not clear the status bits. Once the
temperature drops below the THERM Limit minus the THERM Hysteresis, the corresponding status
bits will be automatically cleared. The THERM bit in the Status Register will be cleared when all
individual channel THERM bits are cleared.
Bit 1 - ETHERM - This bit is set when the External Diode channel exceeds it’s programmed THERM
limit.
Bit 0- ITHERM - This bit is set when the Internal Diode channel exceeds it’s programmed THERM limit.
The Filter Configuration Register controls the digital filter on the External Diode channel.
R/W
R/W
Limit Status
REGISTER
THERM
Section
REGISTER
Filter Control
Low Limit
REGISTER
Status
5.3.2).
B7
-
Table 6.18 THERM Limit Status Register
Table 6.19 Filter Configuration Register
Table 6.17 Low Limit Status Register
B7
-
B6
B7
-
-
B6
-
DATASHEET
B5
B6
-
-
B5
-
34
B5
B4
-
-
B4
-
1°C Temperature Sensor with Hardware Thermal Shutdown
B4
-
B3
-
B3
-
B3
-
B2
-
B2
-
B2
-
ELOW
THERM
B1
B1
E
B1
FILTER[1:0]
ILOW
ITHERM
B0
B0
B0
SMSC EMC1422
DEFAULT
DEFAULT
Datasheet
00h
DEFAULT
00h
00h