F81867 Datasheet, PDF (83/315 Pages) Feature Integration Technology Inc. – 6 UARTs μSuper IO With 128 Bytes FIFO and Power Saving Functions

F81867
RPM mode(CR96 bit4=0):
FAN3 expect speed count value (MSB), in auto fan mode (CR96
C2h
R/W
VBAT
8’h00
bit5Î0) this register is auto updated by hardware.
Duty mode(CR96 bit4=1):
This byte is reserved byte.
RPM mode(CR96 bit4=0):
FAN3 expect speed count value (LSB) or expect PWM duty, in auto
fan mode this register is auto updated by hardware and read only.
Duty mode(CR96 bit4=1):
C3h
R/W
VBAT
8’h01
The Value programming in this byte is duty value. In auto fan mode
(CR96 bit5Î0) this register is updated by hardware.
Ex: 5Î 5*100/255 %
255 Î 100%
FAN3 full speed count reading (MSB). At the moment of reading this
register, the LSB will be latched. This will prevent from data updating
C4h
R/W
5VSB
8’h03
when reading. To read the fan count correctly, read MSB first and
followed read the LSB.
C5h
R/W
5VSB
8’hff
FAN3 full speed count reading (LSB).
VT3 BOUNDARY 1 TEMPERATURE – Index C6h
Bit
Name
R/W Reset Default
Description
The first boundary temperature for VT3 in temperature mode.
When VT3 temperature exceeds this boundary, FAN3 expect value will
3Ch ^{load from segment 1 register (index CAh).}
7-0
BOUND1TMP3
R/W 5VSB _{(60oC) When VT3 temperature is under this boundary – hysteresis, FAN3}
expect value will load from segment 2 register (index CAh).
This byte is a 2’s complement value ranging from -128^ºC ~ 127^ºC.
VT3 BOUNDARY 2 TEMPERATURE – Index C7
Bit
Name
R/W Reset Default
Description
The 2nd BOUNDARY temperature for VT3 in temperature mode.
When VT3 temperature is exceed this boundary, FAN3 expected value
32 will load from segment 2 register (index CBh).
7-0
BOUND2TMP3
R/W 5VSB _{(50oC) When VT3 temperature is below this boundary – hysteresis, FAN3}
expected value will load from segment 3 register (index CCh).
This byte is a 2’s complement value ranging from-128^ºC ~ 127^ºC.
83
Dec, 2011
V0.12P