Intel i3-2328M FF8062701275100 Data Sheet
Product codes
FF8062701275100
Thermal Management
74
Datasheet, Volume 1
5.4.4
Platform Environment Control Interface (PECI)
The Platform Environment Control Interface (PECI) is a one-wire interface that provides
a communication channel between Intel processor and chipset components to external
monitoring devices. The processor implements a PECI interface to allow communication
of processor thermal information to other devices on the platform. The processor
provides a digital thermal sensor (DTS) for fan speed control. The DTS is calibrated at
the factory to provide a digital representation of relative processor temperature.
Averaged DTS values are read using the PECI interface.
a communication channel between Intel processor and chipset components to external
monitoring devices. The processor implements a PECI interface to allow communication
of processor thermal information to other devices on the platform. The processor
provides a digital thermal sensor (DTS) for fan speed control. The DTS is calibrated at
the factory to provide a digital representation of relative processor temperature.
Averaged DTS values are read using the PECI interface.
The PECI physical layer is a self-clocked one-wire bus that begins each bit with a
driven, rising edge from an idle level near zero volts. The duration of the signal driven
high depends on whether the bit value is a Logic 0 or Logic 1. PECI also includes
variable data transfer rate established with every message. The single wire interface
provides low board routing overhead for the multiple load connections in the congested
routing area near the processor and chipset components. Bus speed, error checking,
and low protocol overhead provides adequate link bandwidth and reliability to transfer
critical device operating conditions and configuration information.
driven, rising edge from an idle level near zero volts. The duration of the signal driven
high depends on whether the bit value is a Logic 0 or Logic 1. PECI also includes
variable data transfer rate established with every message. The single wire interface
provides low board routing overhead for the multiple load connections in the congested
routing area near the processor and chipset components. Bus speed, error checking,
and low protocol overhead provides adequate link bandwidth and reliability to transfer
critical device operating conditions and configuration information.
5.4.4.1
Fan Speed Control with Digital Thermal Sensor
Digital Thermal Sensor based fan speed control (T
FAN
) is a recommended feature to
achieve optimal thermal performance. At the T
FAN
temperature, Intel recommends full
cooling capability well before the DTS reading reaches T
j,max
. An example of this would
be T
FAN
= T
j,max
– 10 ºC.
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