ADT7463
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10
T
RANGE
Registers
These registers program the temperaturetofan speed
control slope in automatic fan speed control mode for each
PWM output.
Operating Point Registers
These registers define the target operating temperatures
for each thermal zone when running under dynamic T
MIN
control. This function allows the cooling solution to adjust
dynamically in response to measured temperature and
system performance.
Enhance Acoustics Registers
These registers allow each PWM output controlling fan to
be tweaked to enhance the systems acoustics.
Recommended Implementation
Configuring the ADT7463 as in Figure 12 allows the
systems designer the following features:
" Six VID Inputs (VID0 to VID5) for VRM10 Support
" Two PWM Outputs for Fan Control of Up to Three
Fans (The Front and Rear Chassis Fans Are Connected
in Parallel)
" Three TACH Fan Speed Measurement Inputs
" V
CC
Measured Internally Through Pin 4
" CPU Core Voltage Measurement (V
CORE
)
" 2.5 V Measurement Input Used to Monitor CPU
Current (Connected to V
COMP
Output of ADP316x
VRM Controller) This Is Used to Determine CPU
Power Consumption
" 5 V Measurement Input
" VRM Temperature Uses Local Temperature Sensor
" CPU Temperature Measured Using Remote 1
Temperature Channel
" Ambient Temperature Measured Through Remote 2
Temperature Channel
" If Not Using VID5, This Pin Can Be Reconfigured as
the 12 V Monitoring Input
" Bidirectional THERM
Pin. Allows Intel
?/DIV>
Pentium
?/DIV>
4
PROCHOT
Monitoring and Can Function as an
Overtemperature THERM
Output
" SMBALERT
System Interrupt Output
NOTE: See the AN612 ADT7463 Configuration Application Note
for more information and register settings for all possible
configurations.
Figure 12. Recommended Implementation
AMBIENT
TEMPERATURE
FRONT
CHASSIS
FAN
REAR
CHASSIS
FAN
GND
ADT7463
PWM1
TACH1
D2+
D2
THERM
SDA
SCL
SMBALERT
TACH2
PWM3
TACH3
D1+
D1
PROCHOT
VID[0:4]/VID[0:5]
5(VRM9)/6(VRM10)
3.3VSB
5V
12V/VID5
CURRENT
V
CORE
V
COMP
ADP316x
VRM
CONTROLLER
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