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.
B2h
R/W
VBAT
8’h00
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.
B3h
R/W
VBAT
8’h01
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).
B4h
B5h
R/W
R/W
5VSB
5VSB
8’h03
8’hff
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
load from segment 1 register (index Bah).
3Ch
(60oC)
7-0
BOUND1TMP2
R/W
5VSB
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 -128ºC ~ 127ºC.
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
will load from segment 2 register (index BBh).
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 -128ºC ~ 127ºC.
32
R/W 5VSB
(50ºC)
7-0
BOUND2TMP2
78
Jan, 2012
V0. 12P
FINTEK [ FEATURE INTEGRATION TECHNOLOGY INC. ]
