Intel i5-2540M FF8062700839209 User Manual

Product codes

FF8062700839209

Datasheet

Interfaces

2.5

Platform Environment Control Interface (PECI)

The PECI is a one-wire interface that provides a communication channel between a

PECI client (processor) and a PECI master, usually the PCH. The processor implements

a PECI interface to:

• Allow communication of processor thermal and other information to the PECI

master.

• Read averaged Digital Thermal Sensor (DTS) values for fan speed control.

2.6

Interface Clocking

2.6.1

Internal Clocking Requirements

Table 5.

Processor Reference Clocks

Reference Input Clocks

Input Frequency

Associated PLL

BCLK/BCLK#

133 MHz

Processor/Memory/Graphics

PEG_CLK/PEG_CLK#

100 MHz

PCI Express/DMI/Intel® FDI

DPLL_REF_SSCLK/DPLL_REF_SSCLK#

120 MHz

Embedded DisplayPort (eDP)