Intel 317443-001US Benutzerhandbuch

Intel

®

 Core

TM

 2 Duo processor with the Mobile Intel

®

 945GME Express Chipset

May 2007

Manual

Order Number: 317443-001US

 

9

This section defines conventions and terminology used throughout this document.
Aggressor

A network that transmits a coupled signal to another network.

Any plane-split, void or cutout in a VCC or GND plane.

The front-side bus uses a bus technology called AGTL+, or 

Assisted Gunning Transceiver Logic. AGTL+ buffers are open-

drain, and require pull-up resistors to provide the high logic level 

and termination. AGTL+ output buffers differ from GTL+ buffers 

with the addition of an active pMOS pull-up transistor to assist 

the pull-up resistors during the first clock of a low-to-high 

voltage transition.

Asynchronous GTL+ The processor does not utilize CMOS voltage levels on any 

signals that connect to the processor. As a result, legacy input 

signals such as A20M#, IGNNE#, INIT#, LINT0/INTR, LINT1/

NMI, PWRGOOD, SMI#, SLP#, and STPCLK# utilize GTL+ input 

buffers. Legacy output signals (FERR# and IERR#) and non-

AGTL+ signals (THERMTRIP# and PROCHOT#) also utilize GTL+ 

output buffers. All of these signals follow the same DC 

requirements as AGTL+ signals, however the outputs are not 

actively driven high (during a logical 0 to 1 transition) by the 

processor (the major difference between GTL+ and AGTL+). 

These signals do not have setup or hold time specifications in 

relation to BCLK[1:0], and are therefore referred to as 

“Asynchronous GTL+ Signals”. However, all of the Asynchronous 

GTL+ signals are required to be asserted for at least two BCLKs 

in order for the processor to recognize them.

A component or group of components that, when combined, 

represent a single load on the AGTL+ bus.

The reception on a victim network of a signal imposed by 

aggressor network(s) through inductive and capacitive coupling 

between the networks.

• Backward Crosstalk - Coupling that creates a signal in a 

victim network that travels in the opposite direction as the 

aggressor’s signal.

• Forward Crosstalk - Coupling that creates a signal in a 

victim network that travels in the same direction as the 

aggressor’s signal.

• Even Mode Crosstalk - Coupling from a signal or multiple 

aggressors when all the aggressors switch in the same 

direction that the victim is switching.

• Odd Mode Crosstalk - Coupling from a signal or multiple 

aggressors when all the aggressors switch in the opposite 

direction that the victim is switching.

Flight time is a term in the timing equation that includes the 

signal propagation delay, any effects the system has on the TCO 

of the driver, plus any adjustments to the signal at the receiver