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EMC6D103 Datasheet(PDF) 71 Page - SMSC Corporation

Part # EMC6D103
Description  FAN CONTROL DEVICE WITH HIGH FREQUENCY PWM
PDF  89 Pages
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Manufacturer  SMSC [SMSC Corporation]
Direct Link  http://www.smsc.com
Logo SMSC - SMSC Corporation

EMC6D103 Datasheet(HTML) 71 Page - SMSC Corporation

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Fan Control Device with High Frequency PWM Support and Hardware Monitoring Features
Datasheet
SMSC EMC6D103
71
Revision 0.4 (04-04-05)
DATASHEET
8.2.19
Registers 67-69h: Zone Low Temperature Limit
These registers become read only when the Lock bit is set. Any further attempts to write to these
registers shall have no effect.
These are the temperature limits for the individual zones. When the current temperature equals this
limit, the fan will be turned on if it is not already. When the temperature exceeds this limit, the fan
speed will be increased according to the auto fan algorithm based on the setting in the Zone x Range
/ PWMx Frequency register. Default = -127
°C=80h
APPLICATION NOTE: All three Zone Low Temperature Limit registers must be programmed to a valid value (other
than 80h) to allow the AutoFan control to operate.
8.2.20
Registers 6A-6Ch: Absolute Temperature Limit
Table 8.34 Registers 67-69h: Zone Low Temperature Limit
Register
Address
Read/
Write
Register Name
Bit 7
(MSb)
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
(LSb)
Default
Value
67h
R/W
Zone 1 Low Temp Limit
7
6
5
4
3
2
1
0
80h
68h
R/W
Zone 2 Low Temp Limit
7
6
5
4
3
2
1
0
80h
69h
R/W
Zone 3 Low Temp Limit
7
6
5
4
3
2
1
0
80h
Table 8.35 Temperature Limit vs. Register Setting
LIMIT
LIMIT (DEC)
LIMIT (HEX)
-127
°c
-127
81h
.
.
.
.
.
.
.
.
.
-50
°c-50
CEh
.
.
.
.
.
.
.
.
.
0
°c0
00h
.
.
.
.
.
.
.
.
.
50
°c50
32h
.
.
.
.
.
.
.
.
.
127
°c
127
7Fh
Table 8.36 Registers 6A-6Ch: Absolute Temperature Limit
Register
Address
Read/
Write
Register Name
Bit 7
(MSb)
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
(LSb)
Default
Value
6Ah
R/W
Zone 1 Temp Absolute Limit
7
6
5
4
3
2
1
0
64h
6Bh
R/W
Zone 2 Temp Absolute Limit
7
6
5
4
3
2
1
0
64h
6Ch
R/W
Zone 3 Temp Absolute Limit
7
6
5
4
3
2
1
0
64h



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