F81866A Datasheet, PDF (78/210 Pages) Feature Integration Technology Inc. – 6 UARTs Super IO With 128 Bytes FIFO and Power

B2h
R/W
B3h
R/W
B4h
R/W
B5h
R/W
VBAT
VBAT
5VSB
5VSB
8’h00
8’h01
8’h03
8’hff
F81866A
RPM mode(CR96 bit2=0):
FAN2 expect speed count value (MSB), in auto fan
mode(CR96 bit3Î0) this register is auto updated by
hardware.
Duty mode (CR96 bit2=1):
This byte is reserved byte.
RPM mode(CR96 bit2=0):
FAN2 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 bit2=1):
The Value programming in this byte is duty value. In auto fan
mode (CR96 bit3Î0) this register is updated by hardware.
Ex: 5Î 5*100/255 %
255 Î 100%
FAN2 full speed count reading (MSB). At the moment of
reading this register, the LSB will be latched. This will
prevent from data updating when reading. To read the fan
count correctly, read MSB first and followed read the LSB.
FAN2 full speed count reading (LSB).
VT2 BOUNDARY 1 TEMPERATURE – Index B6h
Bit
Name
R/W Reset Default
Description
The first boundary temperature for VT2 in temperature mode.
When VT2 temperature exceeds this boundary, FAN2 expect value will
3Ch ^{load from segment 1 register (index Bah).}
7-0
BOUND1TMP2
R/W 5VSB _{(60oC) When VT2 temperature is under this boundary – hysteresis, FAN2 expect}
value will load from segment 2 register (index BAh).
This byte is a 2’s complement value ranging from -128^ºC ~ 127^ºC.
VT2 BOUNDARY 2 TEMPERATURE – Index B7
Bit
Name
R/W Reset Default
Description
The 2nd BOUNDARY temperature for VT2 in temperature mode.
When VT2 temperature is exceed this boundary, FAN2 expected value
32 will load from segment 2 register (index BBh).
7-0
BOUND2TMP2
R/W 5VSB _{(50ºC) When VT2 temperature is below this boundary – hysteresis, FAN2}
expected value will load from segment 3 register (index BCh).
This byte is a 2’s complement value ranging from -128^ºC ~ 127^ºC.
78
Jan, 2012
V0. 12P