emc1428 Standard Microsystems Corp., emc1428 Datasheet - Page 34

• Manufacturer Part Number: emc1428
• Description: 1 Degree C Multiple Temperature Sensor With Hw Thermal Shutdown
• Manufacturer: Standard Microsystems Corp.

Revision 0.68 (07-08-08)
5.7
5.8
ADDR.
ADDR.
ADDR.
1Ah
21h
19h
20h
30h
64h
5Eh
5Fh
Therm Hysteresis Register
Therm Limit Registers
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
The device contains both high and low limits for all temperature channels. If the measured temperature
meets or 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 the low limit, the corresponding status bit is set and
the ALERT pin is asserted.
The limit registers with multiple addresses are fully accessible at either address.
The THERM Hysteresis is used in conjunction with the THERM Limit Registers to assert the
SYS_SHDN pin. In addition, the THERM Hysteresis Register is used with the High Limit Registers
when the ALERT pin is configured to act as a comparator (see
Diode 7 High
Diode 7 Low
Internal Diode
REGISTER
THERM Limit
THERM Limit
THERM Limit
THERM Limit
THERM Limit
Limit Low
Limit Low
REGISTER
REGISTER
External
External
Hysteresis
External
External
External
External
THERM
Diode 1
Diode 2
Diode 3
Diode 4
Byte
Byte
Table 5.9 Temperature Limit Registers (continued)
Table 5.10 Therm Hysteresis Register
0.5
0.5
B7
Sign
Sign
Sign
Sign
Sign
Table 5.11 Therm Limit Registers
B7
B7
-
1°C Multiple Temperature Sensor with HW Thermal Shutdown & Hottest of Thermal Zones
0.25
0.25
B6
DATASHEET
B6
B6
64
64
64
64
64
64
0.125
0.125
B5
34
B5
B5
32
32
32
32
32
32
B4
B4
B4
16
16
16
16
16
16
-
-
B3
-
-
B3
B3
8
8
8
8
8
8
Section
B2
-
-
B2
B2
4
4
4
4
4
4
4.1.2).
B1
B1
B1
-
-
2
2
2
2
2
2
B0
B0
B0
1
1
1
1
1
1
-
-
SMSC EMC1428
DEFAULT
DEFAULT
DEFAULT
(10°C)
(85°C)
(85°C)
(85°C)
(85°C)
(85°C)
Datasheet
0Ah
55h
55h
55h
55h
55h
00h
00h