F81867 Datasheet, PDF (247/315 Pages) Feature Integration Technology Inc. – 6 UARTs μSuper IO With 128 Bytes FIFO and Power Saving Functions

D. FAN1 Offset A0h~AFh
Address
Attribute
Reset
A0h
RO
3VCC
A1h
RO
3VCC
A2h
R/W
VBAT
A3h
R/W
VBAT
A4h
R/W
5VSB
A5h
R/W
5VSB
F81867
Default
Value
Description
FAN1 count reading (MSB). At the moment of reading this
register, the LSB will be latched. This will prevent from data
8’h0f
updating when reading. To read the fan count correctly, read
MSB first and followed read the LSB.
8’hff FAN1 count reading (LSB).
RPM mode(CR96 bit0=0):
FAN1 expect speed count value (MSB), in auto fan mode (CR96
8’h00 bit1(0) 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.
8’h01 Duty mode(CR96 bit0=1):
The Value programming in this byte is duty value. In auto fan
mode (CR96 bit1(0) this register is updated by hardware.
Ex: 5( 5*100/255 %
255 ( 100%
FAN1 full speed count reading (MSB). At the moment of reading
this register, the LSB will be latched. This will prevent from data
8’h03
updating when reading. To read the fan count correctly, read
MSB first and followed read the LSB.
8’hff FAN1 full speed count reading (LSB).
VT1 BOUNDARY 1 TEMPERATURE – Offset 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 be loaded from segment 1 register (Offset AAh).
3Ch
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
(Offset ABh).
This byte is a 2’s complement value ranged from -128’C ~ 127’C.
247
Dec, 2011
V0.12P