EMC6D100-DK SMSC [SMSC Corporation], EMC6D100-DK Datasheet - Page 50

• Manufacturer Part Number: EMC6D100-DK
• Description: ENVIRONMENTAL MONITORING AND CONTROL DEVICE WITH AUTOMATIC FAN CAPABILITY
• Manufacturer: SMSC [SMSC Corporation]

8.16
SMSC EMC6D100/EMC6D101
REGISTER
ADDRESS
4Eh
4Fh
50h
51h
52h
53h
Registers 4E-53h: Temperature Limit Registers
Setting the Lock bit has no effect on these registers.
If an external temperature input or the internal temperature sensor either exceeds the value set in the high
limit register or falls below the value set in the low limit register, the corresponding bit will be set
automatically by the EMC6D100/EMC6D101 in the Interrupt Status Register 1 (41h). For example, if the
temperature read from the Remote1- and Remote2+ inputs exceeds the Processor (Zone1) High Temp
register limit setting, Interrupt Status Register 1 ZN1 bit will be set. The temperature limits in these
registers are represented as 8 bit, 2’s complement, signed numbers in Celsius, as shown below in Table
8.5.
WRITE
READ/
R/W
R/W
R/W
R/W
R/W
R/W
Processor (Zone1)
Processor (Zone1)
Remote (Zone3)
Remote (Zone3)
Internal (Zone2)
Internal (Zone2)
REGISTER
High Temp
High Temp
High Temp
-127°c
-50°c
0°c
50°c
127°c
Low Temp
Low Temp
Low Temp
TEMPERATURE
NAME
Table 8.5 - Temperature Limits vs Register Settings
(MSB)
BIT 7
DATASHEET
7
7
7
7
7
7
-127
-50
0
50
127
BIT 6
LIMIT (DEC)
6
6
6
6
6
6
Page 50
BIT 5
5
5
5
5
5
5
BIT 4
4
4
4
4
4
4
81h
CEh
00h
32h
7Fh
LIMIT (HEX)
BIT 3
3
3
3
3
3
3
Environmental Monitoring and Control Device
BIT 2
2
2
2
2
2
2
BIT 1
1
1
1
1
1
1
(LSB)
BIT 0
0
0
0
0
0
0
Rev. 09-09-04
DEFAULT
Datasheet
VALUE
81h
7Fh
81h
7Fh
81h
7Fh