Справочник Пользователя для Intel GME965

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316704-001 / Development Kit User’s Manual 

Table 2

 defines conventions and terminology used throughout this document. 

Aggressor 

A network that transmits a coupled signal to another network. 

Anti-etch 

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

Assisted Gunning 

Transceiver Logic+ 

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.   

Bus Agent 

A component or group of components that, when combined, represent a 
single load on the AGTL+ bus. 

Crosstalk 

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 

Flight time is a term in the timing equation that includes the signal 
propagation delay, any effects the system has on the T

CO

 (time from 

clock-in to data-out) of the driver, plus any adjustments to the signal at 
the receiver needed to ensure the setup time of the receiver. More 
precisely, flight time is defined as: 

The time difference between a signal at the input pin of a receiving agent 
crossing the switching voltage (adjusted to meet the receiver