Signal Description; Signal Description Buffer Types - Intel 2ND GENERATION CORE PROCESSOR FAMILY DESKTOP - DATASHEET VOLUME 1 01-2011 Datasheet

Signal Description
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Signal Description

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.
Notations
The signal description also includes the type of buffer used for the particular signal (see
Table 6-1).
Table 6-1.

Signal Description Buffer Types

Signal
PCI Express*
DMI
CMOS
DDR3
Ref
Asynchronous
Notes:
1. Qualifier for a buffer type.
Datasheet, Volume 1
I
O
I/O
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.
Direct Media Interface signals. These signals are based on PCI Express* 2.0 Signaling
Environment AC Specifications (5 GT/s), but are DC coupled. The buffers are not 3.3-
V tolerant.
CMOS buffers. 1.1-V tolerant
DDR3 buffers: 1.5-V tolerant
Analog reference or output. May be used as a threshold voltage or for buffer
A
compensation
Voltage reference signal
1
Signal has no timing relationship with any reference clock.
Signal Type
Input Pin
Output Pin
Bi-directional Input/Output Pin
Description
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