F81866A
RPM mode(CR96 bit4=0):
FAN3 expect speed count value (MSB), in auto fan mode
(CR96 bit5Î0) this register is auto updated by hardware.
Duty mode(CR96 bit4=1):
C2h
R/W
VBAT
8’h00
This byte is reserved byte.
RPM mode(CR96 bit4=0):
FAN3 expect speed count value (LSB) or expect PWM duty,
in auto fan mode this register is auto updated by hardware
and read only.
C3h
R/W
VBAT
8’h01
Duty mode(CR96 bit4=1):
The Value programming in this byte is duty value. In auto fan
mode (CR96 bit5Î0) this register is updated by hardware.
Ex: 5Î 5*100/255 %
255 Î 100%
FAN3 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.
FAN3 full speed count reading (LSB).
C4h
C5h
R/W
R/W
5VSB
5VSB
8’h03
8’hff
VT3 BOUNDARY 1 TEMPERATURE – Index C6h
Bit
Name
R/W
Reset Default
Description
The first boundary temperature for VT3 in temperature mode.
When VT3 temperature exceeds this boundary, FAN3 expect value will
load from segment 1 register (index CAh).
3Ch
5VSB
7-0
BOUND1TMP3
R/W
(60oC)
When VT3 temperature is under this boundary – hysteresis, FAN3
expect value will load from segment 2 register (index CAh).
This byte is a 2’s complement value ranging from -128ºC ~ 127ºC.
VT3 BOUNDARY 2 TEMPERATURE – Index C7
Bit
Name
R/W
Reset Default
Description
The 2nd BOUNDARY temperature for VT3 in temperature mode.
When VT3 temperature is exceed this boundary, FAN3 expected value
will load from segment 2 register (index CBh).
When VT3 temperature is below this boundary – hysteresis, FAN3
expected value will load from segment 3 register (index CCh).
This byte is a 2’s complement value ranging from-128ºC ~ 127ºC.
32
5VSB
7-0
BOUND2TMP3
R/W
(50oC)
82
Jan, 2012
V0. 12P
FINTEK [ FEATURE INTEGRATION TECHNOLOGY INC. ]
