Mobile Intel Pentium 4 Processor - M and Intel 845MP/MZ Chipset Platform Design Guide

Mobile Intel
®
Pentium
®
4 Processor-M and Intel
®
845MP/845MZ Chipset Platform
16 Design Guide
R
Document Document Number/Source
Intel
®
82562ET/EM PCB Design Platform LAN Connect (AP-412) Contact your Field Representative
1.2. Conventions and Terminology
This section defines conventions and terminology that are used throughout this document.
Table 1. Conventions and Terminology
Convention/
Terminology
Definition
Aggressor A network that transmits a coupled signal to another network is called the aggressor network.
AGTL+ The processor System Bus uses a bus technology called AGTL+, or Assisted Gunning
Transceiver Logic. AGTL+ buffers are open-drain and require pull-up resistors that provide the
high logic level and termination. AGTL+ output buffers differ from GTL+ buffers by 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.
Bus Agent A component or group of components that, when combined, represent a single load on the
AGTL+ bus.
Corner Describes how a component performs when all parameters that could impact performance are
adjusted simultaneously to have the best or worst impact on performance. Examples of these
parameters include variations in manufacturing process, operating temperature, and operating
voltage. Performance of an electronic component may change as a result of (including, but not
limited to): clock to output time, output driver edge rate, output drive current, and input drive
current. Discussion of the “slow” corner means having a component operating at its slowest,
weakest drive strength performance. Similar discussion of the “fast” corner means having a
component operating at its fastest, strongest drive strength performance. Operation or simulation
of a component at its slow corner and fast corner is expected to bound the extremes between
slowest, weakest performance and fastest, strongest performance.
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 single or multiple aggressors when all the aggressors
switch in the same direction that the victim is switching.
Odd Mode Crosstalk—coupling from single or multiple aggressors when all the aggressors switch
in the opposite direction that the victim is switching.