Interfaces
38 Datasheet, Volume 1
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. 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
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Table 2-5. Reference Clock
Reference Input Clock Input Frequency Associated PLL
BCLK[0]/BCLK#[0] 100 MHz Processor/Memory/Graphics/PCIe/DMI/FDI