ADT7463
FRONT
CHASSIS
FAN
REAR
CHASSIS
FAN
AMBIENT
TEMPERATURE
ADT7463
TACH2
PWM1
TACH1
PWM3
TACH3
D1+
D1–
VID[0:4]/VID[0:5]
D2+
D2–
THERM
5(VRM9)/6(VRM10)
PROCHOT
ADP316x
VRM
CONTROLLER
VCOMP
3.3VSB
5V
12V/VID5
CURRENT
SDA
SCL
SMBALERT
VCORE
GND
Figure 2. Recommended Implementation
RECOMMENDED IMPLEMENTATION
Configuring the ADT7463 as in Figure 2 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.
• VCC measured internally through Pin 4.
• CPU core voltage measurement (VCORE).
• 2.5 V measurement input used to monitor CPU current
(connected to VCOMP 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 Pentium 4 PROCHOT
monitoring and can function as an overtemperature THERM
output.
• SMBALERT system interrupt output.
See the AN-612 ADT7463 Configuration application note for more
information and register settings for all possible configurations
(www.analog.com/UploadedFiles/Application_Notes/408599520AN612_0.pdf).
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REV. C