Signal Description
2.20
Controller Link
Table 2-20. Controller Link Signals
Signal Name
CL_CLK0
Type
Description
Controller Link Clock 0: bi-directional clock that connects to the
I/O
(G)MCH.
Controller Link Data 0: bi-directional data that connects to the
(G)MCH.
CL_DATA0
CL_VREF0
CL_RST0#
I/O
Controller Link Reference Voltage 0: External reference
voltage for Controller Link 0.
ICH10 Corporate: When using internal reference voltage as
configured by CLINKVREFSEL (ICHSTRP0:bit 5), an external
circuit is not required and pin is No Connect (Recommended
Configuration). Optionally, an external reference voltage
generation circuit may be used (requires CLINKVREFSEL = 1).
I
Controller Link Reset 0: North Controller Link reset that
connects to the (G)MCH.
O
2.21
Intel® Quiet System Technology
Table 2-21. Intel® Quiet System Technology Signals
Signal Name
Type
Description
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
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.
PWM[2:0]
OD O
These signals are 5V tolerant.
TACH0/GPIO17
TACH1/GPIO1
TACH2/GPIO6
TACH3/GPIO7
Fan Tachometer Inputs: Tachometer pulse input signal that is
used to measure fan speed. This signal is connected to the
“Sense” signal on the fan.
I
Can instead be used as a GPIO.
68
Datasheet
INTEL [ INTEL ]
