EMC1422 SMSC Corporation, EMC1422 Datasheet - Page 29

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

1°C Temperature Sensor with Hardware Thermal Shutdown
Datasheet
SMSC EMC1422
6.6
6.7
ADDR.
ADDR
0Bh
0Ch
0Dh
0Eh
05h
06h
07h
13h
08h
14h
11h
12h
Limit Registers
Scratchpad Registers
The device contains both high and low limits for all temperature channels. If the measured temperature
exceeds the high limit, then the corresponding status bit is set and the ALERT pin is asserted.
Likewise, if the measured temperature is less than or equal to the low limit, the corresponding status
bit is set and the ALERT pin is asserted.
The data format for the limits must match the selected data format for the temperature so that if the
extended temperature range is used, the limits must be programmed in the extended data format.
The limit registers with multiple addresses are fully accessible at either address.
The Scratchpad Registers are Read Write registers that are used for place holders to be software
compatible with legacy programs. Reading from the registers will return what is written to them.
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Internal Diode
Internal Diode
Diode High
Diode High
Diode Low
Diode Low
REGISTER
High Limit
Limit High
Limit High
Low Limit
Limit Low
Limit Low
External
External
External
External
Byte
Byte
Byte
Byte
REGISTER
Scratchpad
Scratchpad
Table 6.7 Temperature Limit Registers
Table 6.8 Scratchpad Register
128
128
128
128
0.5
0.5
B7
B7
7
7
DATASHEET
0.25
0.25
B6
64
64
64
64
B6
6
6
29
0.125
0.125
B5
32
32
32
32
B5
5
5
B4
16
16
16
16
-
-
B4
4
4
B3
B3
3
3
8
8
8
8
-
-
B2
2
2
B2
4
4
4
4
-
-
B1
1
1
B1
2
2
2
2
-
-
Revision 1.16 (03-15-07)
B0
0
0
B0
1
1
1
1
-
-
DEFAULT
DEFAULT
(85°C)
(85°C)
00h
00h
(0°C)
(0°C)
55h
00h
55h
00h
00h
00h