F81866A
RPM mode(CR96 bit0=0):
FAN1 expect speed count value (MSB), in auto fan mode (CR96
8’h00 bit1Î0) this register is auto updated by hardware.
Duty mode(CR96 bit0=1):
A2h
R/W
VBAT
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
8’h03
A4h
A5h
R/W
R/W
5VSB
5VSB
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 – 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
be loaded from segment 1 register (index AAh).
3Ch
(60oC)
7-0
BOUND1TMP1
R/W
5VSB
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 -128ºC ~ 127ºC.
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
will load from segment 2 register (index ABh).
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 -128ºC ~ 127ºC.
32
R/W 5VSB
(50ºC)
7-0
BOUND2TMP1
74
Jan, 2012
V0. 12P
FINTEK [ FEATURE INTEGRATION TECHNOLOGY INC. ]
