EMC6D103-CK SMSC [SMSC Corporation], EMC6D103-CK Datasheet - Page 64

• Manufacturer Part Number: EMC6D103-CK
• Description: FAN CONTROL DEVICE WITH HIGH FREQUENCY PWM
• Manufacturer: SMSC [SMSC Corporation]

Revision 0.4 (04-04-05)
8.2.13
Register
Address
4Eh
4Fh
50h
51h
52h
53h
TEMPERATURE
Read/
Write
R/W
R/W
R/W
R/W
R/W
R/W
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 is less than or equal to the value set in the low limit register, the corresponding
bit will be set automatically by the EMC6D103 in the Interrupt Status Register 1 (41h). For example,
if the temperature reading from the Remote1- and Remote1+ inputs exceeds the Remote Diode 1 High
Temp register limit setting, Bit[4] D1 of the Interrupt Status Register 1 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
-127°c
127°c
-50°c
50°c
0°c
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Table
Table 8.21 Registers 4E-53h: Temperature Limit Registers
Remote Diode 1 High Temp
Remote Diode 2 High Temp
Remote Diode 1 Low Temp
Remote Diode 2 Low Temp
Internal High Temp
Table 8.22 Temperature Limits vs. Register Settings
Internal Low Temp
Register Name
8.22.
Fan Control Device with High Frequency PWM Support and Hardware Monitoring Features
DATASHEET
LIMIT (DEC)
(MSb)
Bit 7
7
7
7
7
7
7
-127
127
-50
50
0
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64
Bit 6
6
6
6
6
6
6
Bit 5
5
5
5
5
5
5
Bit 4
4
4
4
4
4
4
Bit 3
3
3
3
3
3
3
Bit 2
2
2
2
2
2
2
LIMIT (HEX)
Bit 1
CEh
7Fh
81h
00h
32h
1
1
1
1
1
1
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SMSC EMC6D103
(LSb)
Bit 0
0
0
0
0
0
0
Datasheet
Default
Value
81h
7Fh
81h
7Fh
81h
7Fh