EMC6D102_06 SMSC [SMSC Corporation], EMC6D102_06 Datasheet - Page 64
EMC6D102_06
Manufacturer Part Number
EMC6D102_06
Description
Fan Control Device with Hardware Monitoring and Acoustic Noise Reduction Features
Manufacturer
SMSC [SMSC Corporation]
Datasheet
1.EMC6D102_06.pdf
(86 pages)
- Current page: 64 of 86
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Revision 0.4 (06-15-06)
7.2.20
Register
Address
67h
68h
69h
MINIMUM PWM DUTY
Read/
Write
R/W
R/W
R/W
These registers specify the minimum duty cycle that the PWM will output when the measured
temperature reaches the Temperature LIMIT register setting in Auto Fan Control Mode.
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 = 90°C=5Ah
100%
25%
50%
0%
.
.
.
.
.
.
.
.
.
Zone 1 Low Temp Limit
Zone 2 Low Temp Limit
Zone 3 Low Temp Limit
Register Name
Table 7.13 PWM Duty vs. Register Setting
Fan Control Device with Hardware Monitoring and Acoustic Noise Reduction Features
DATASHEET
VALUE (DECIMAL)
(MSb)
Bit 7
7
7
7
64
255
128
64
0
Bit 6
.
.
.
.
.
.
.
.
.
6
6
6
Bit 5
5
5
5
Bit 4
4
4
4
Bit 3
3
3
3
Bit 2
2
2
2
VALUE (HEX)
Bit 1
FFh
00h
40h
80h
1
1
1
.
.
.
.
.
.
.
.
.
SMSC EMC6D102
(LSb)
Bit 0
0
0
0
Datasheet
Default
Value
5Ah
5Ah
5Ah
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