EMC6D102_06 SMSC [SMSC Corporation], EMC6D102_06 Datasheet - Page 66
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: 66 of 86
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Revision 0.4 (06-15-06)
7.2.22
Register
Address
6Dh
6Eh
ABSOLUTE LIMIT
Read/
Write
R/W
R/W
Registers 6D-6Eh: Zone Hysteresis Registers
These registers become read only when the Lock bit is set. Any further attempts to write to these
registers shall have no effect.
If the temperature is above the Zone x Low Temp Limit, then drops below Zone x Low Temp Limit, the
following will occur:
The fan will remain on, at Fan PWM Minimum, until the temperature goes a certain amount below the
associated zones low temperature limit (see Zone x Low Temp Limit registers). That is, when the
temperature is less than the temperature limit minus the hysteresis value, the fan will turn off.
The Hysteresis registers control this amount. See below table for details.
-127°c
127°c
-50°c
50°c
0°c
.
.
.
.
.
.
.
.
.
.
.
.
Zone 1, Zone 2 Hysteresis
Zone 3, Hysteresis
Register Name
Table 7.15 Absolute Limit vs. Register Setting
SETTING
Fh
Fan Control Device with Hardware Monitoring and Acoustic Noise Reduction Features
0h
5h
.
.
.
.
.
Table 7.16 Hysteresis Settings
ABS LIMIT (DEC)
DATASHEET
(MSb)
Bit 7
H1-3
H3-3
-127
127
-50
50
0
.
.
.
.
.
.
.
.
.
.
.
.
66
Bit 6
H1-2
H3-2
HYSTERESIS
Bit 5
H1-1
H3-1
15°C
0°C
5°C
.
.
.
.
.
.
Bit 4
H1-0
H3-0
Bit 3
H2-3
RES
Bit 2
H2-2
RES
ABS LIMIT (HEX)
Bit 1
H2-1
RES
CEh
7Fh
81h
00h
32h
.
.
.
.
.
.
.
.
.
.
.
.
SMSC EMC6D102
(LSb)
Bit 0
H2-0
RES
Datasheet
Default
Value
44h
40h
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