Getac 9270D Service Manual page 124

4.18 Intel® Quiet System Technology Signals
Name
PWM[3:0]
(Desktop Only)
/ TP[12:9]
(Mobile Only)
TACH0
(Desktop Only)
/ GPIO17
TACH1
(Desktop Only)
/ GPIO1
TACH2
(Desktop Only)
/ GPIO6
TACH3(Deskto
p Only) /
GPIO7
SST
PECI
Type
Fan Pulse Width Modulation Outputs: Pulse Width
Modulated duty cycle output signal that is used for Intel®
Quiet System Technology.
When controlling a 3-wire fan, this signal controls a power
OD O
transistor that, in turn, controls power to the fan. When
controlling a 4-wire fan, this signal is connected to the "
Control" signal on the fan. The polarity of this signal is
programmable. The output default is low. These signals are 5V
tolerant.
Fan Tachometer Inputs: Tachometer pulse input signal that
is used to measure fan speed. This signal is connected to the "
I
Sense" signal on the fan.
Can instead be used as a GPIO.
Simple Serial Transport: Single-wire, serial bus. Connect to
I/O SST compliant devices such as SST thermal sensors or voltage
sensors.
Platform Environment Control Interface: Single-wire, serial
I/O bus. Connect to corresponding pin of the processor for
accessing processor digital thermometer.
Description