F81867 Datasheet, PDF (75/315 Pages) Feature Integration Technology Inc. – 6 UARTs μSuper IO With 128 Bytes FIFO and Power Saving Functions

F81867
RPM mode(CR96 bit0=0):
FAN1 expect speed count value (MSB), in auto fan mode (CR96
A2h
R/W
VBAT
8’h00 bit1Î0) this register is auto updated by hardware.
Duty mode(CR96 bit0=1):
This byte is reserved byte.
RPM mode(CR96 bit0=0):
FAN1 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 bit0=1):
A3h
R/W
VBAT 8’h01
The Value programming in this byte is duty value. In auto fan mode
(CR96 bit1Î0) this register is updated by hardware.
Ex: 5Î 5*100/255 %
255 Î 100%
FAN1 full speed count reading (MSB). At the moment of reading this
register, the LSB will be latched. This will prevent from data updating
A4h
R/W
5VSB 8’h03
when reading. To read the fan count correctly, read MSB first and
followed read the LSB.
A5h
R/W
5VSB
8’hff FAN1 full speed count reading (LSB).
VT1 BOUNDARY 1 TEMPERATURE – Index A6h
Bit
Name
R/W Reset Default
Description
The first boundary temperature for VT1 in temperature mode.
When VT1 temperature exceeds this boundary, expected FAN1 value will
3Ch ^{be loaded from segment 1 register (index AAh).}
7-0
BOUND1TMP1
R/W 5VSB _{(60oC) When VT1 temperature is under this boundary – hysteresis, expected}
FAN1 value will be loaded from segment 2 register (index ABh).
This byte is a 2’s complement value ranged from -128^ºC ~ 127^ºC.
VT1 BOUNDARY 2 TEMPERATURE – Index A7
Bit
Name
R/W Reset Default
Description
The 2nd BOUNDARY temperature for VT1 in temperature mode.
When VT1 temperature is exceed this boundary, FAN1 expected value
32 will load from segment 2 register (index ABh).
7-0
BOUND2TMP1
R/W 5VSB _{(50ºC) When VT1 temperature is below this boundary – hysteresis, FAN1}
expected value will load from segment 3 register (index ACh).
This byte is a 2’s complement value ranging from -128^ºC ~ 127^ºC.
75
Dec, 2011
V0.12P