ADT7476
Rev. B | Page 8 of 72
Pin No.
Mnemonic
Description
17
D1–
Cathode Connection to First Thermal Diode.
18
D1+
Anode Connection to First Thermal Diode.
19
VID4
Digital Input. Voltage supply readouts from CPU. This value is read into the VID code register (0x43).
GPIO4
General-Purpose Open-Drain Digital I/O.
20 +5V
IN
Analog Input. Mo5 V power supply.
21 +12V
IN
Analog Input. Mo12 V power supply.
VID5
Digital Input. Voltage supply readouts from CPU. This value is read into the VID code register (0x43).
22 +2.5V
IN
Analog Input. Mo2.5 V supply, typically a chipset voltage.
THERM
Alternatively, this pin can be reconfigured as a bidirectional/omnidirectional THERM pin. Can be used to time
and monitor assertions on the THERM input. For example, can be connected to the PROCHOT output of an Intel
Pentium 4 processor or to the output of a trip point temperature sensor. Can be used as an output to signal
overtemperature conditions.
23 V
CCP
Analog Input. Monitors processor core voltage (0 V to 3 V).
24 PWM1 Digital Output (Open Drain). Pulse-width modulated output to control Fan 1 speed. Requires 10 kΩ typical
pull-up.
XTO
Also functions as the output from the XOR tree in XOR test mode.
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