Analog Devices dBCool ADT7473 Manual page 35

Recommended Implementation 1
Configuring the ADT7473, as in Figure 46, provides the system
designer with the following features:
•
Two PWM outputs for fan control of up to three fans. (
front and rear chassis fans are connected in parallel.
•
Three TACH fan speed measurement inputs.
•
V measured internally through Pin 4.
CC
•
CPU core voltage measurement (V
•
VRM temperature using local temperature sensor.
FRONT
CHASSIS
FAN
REAR
CHASSIS
FAN
)
).
CORE
TACH2
PWM3
TACH3
AMBIENT
D1+
TEMPERATURE
D1–
Figure 46. Recommended Implementation 1
•
CPU temperature measured using the Remote 1
temperature channel.
•
The
Ambient temperature measured through t
temperature channel.
•
Bidirectional THERM pin allows the monitoring of
PROCHOT output from an Intel Pentium 4 processor, for
example, or can be used as an overtemperature THERM
output.
•
SMBALERT system interrupt output.
ADT7473
PWM1
TACH1
D2+
D2–
THERM
PROCHOT
SDA
SCL
SMBALERT
GND
Rev. A | Page 35 of 76
CPU FAN
CPU
ICH
ADT7473
he Remote 2