1°C Temperature Sensor with Hardware Thermal Shutdown
Datasheet
Table 6.15 Consecutive Alert / THERM Settings
NUMBER OF CONSECUTIVE OUT OF LIMIT
2
1
0
MEASUREMENTS
0
0
0
1
(default for CALRT[2:0])
0
0
1
0
1
1
1
1
1
2
3
4
(default for CTHRM[2:0])
APPLICATION NOTE: When measuring a 65nm Intel CPUs, the Ideality Setting should be the default 12h. When
measuring 45nm Intel CPUs, the Ideality Setting should be 15h.
6.14
High Limit Status Register
Table 6.16 High Limit Status Register
ADDR.
R/W
REGISTER
B7
B6
B5
B4
B3
B2
B1
B0
DEFAULT
High Limit
Status
35h
R-C
-
-
-
-
-
-
EHIGH
IHIGH
00h
The High Limit Status Register contains the status bits that are set when a temperature channel high
limit is exceeded. If any of these bits are set, then the HIGH status bit in the Status Register is set.
Reading from the High Limit Status Register will clear all bits if. Reading from the register will also
clear the HIGH 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 Section 5.3.2).
Bit 1 - EHIGH - This bit is set when the External Diode channel exceeds its programmed high limit.
Bit 0 - IHIGH - This bit is set when the Internal Diode channel exceeds its programmed high limit.
6.15
Low Limit Status Register
Table 6.17 Low Limit Status Register
ADDR.
R/W
REGISTER
B7
B6
B5
B4
B3
B2
B1
B0
DEFAULT
Low Limit
Status
36h
R-C
-
-
-
-
-
-
ELOW
ILOW
00h
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.
SMSC EMC1422
Revision 1.24 (02-05-08)
DATA3S3HEET
SMSC [ SMSC CORPORATION ]
