Intel i5-2520M FF8062700840017 User Manual

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Datasheet

This chapter describes the processor signals. They are arranged in functional groups 

according to their associated interface or category. The following notations are used to 

describe the signal type:

The signal description also includes the type of buffer used for the particular signal:

NOTE:
1.

Qualifier for a buffer type.

I

Input  Pin

O

Output  Pin

I/O

Bi-directional Input/Output Pin

PCI Express*

PCI Express interface signals. These signals are compatible with PCI 
Express 2.0 Signalling Environment AC Specifications and are AC coupled. 
The buffers are not 3.3-V tolerant. Refer to the PCIe specification.

FDI

Intel Flexible Display interface signals. These signals are compatible with 
PCI Express 2.0 Signaling Environment AC Specifications, but are DC 
coupled. The buffers are not 3.3-V tolerant.

DMI

Direct Media Interface signals. These signals are compatible with PCI 
Express 2.0 Signaling Environment AC Specifications, but are DC coupled. 
The buffers are not 3.3-V tolerant.

CMOS

CMOS buffers. 1.1-V tolerant

DDR3

DDR3 buffers: 1.5-V tolerant

A

Analog reference or output. May be used as a threshold voltage or for 
buffer compensation

GTL

Gunning Transceiver Logic signaling technology

Ref

Voltage reference signal

Asynchronous

1

Signal has no timing relationship with any reference clock.