Intel
®
Core
TM
Duo processor with the Mobile Intel
®
945GM Express Chipset
Development Kit User’s Manual 11
About This Manual
voltages are stable and should go inactive as soon as any of these
voltages fail their specifications.
Ringback The voltage to which a signal changes after reaching its maximum
absolute value. Ringback may be caused by reflections, driver
oscillations, or other transmission line phenomena.
System Bus The System Bus is the microprocessor bus of the processor.
Setup Window The time between the beginning of Setup to Clock (TSU_MIN) and the
arrival of a valid clock edge. This window may be different for each type
of bus agent in the system.
Simultaneous Switching Output
Simultaneous Switching Output (SSO) effects are differences in
electrical timing parameters and degradation in signal quality caused by
multiple signal outputs simultaneously switching voltage levels in the
opposite direction from a single signal or in the same direction. These are
called odd mode and even mode switching, respectively. This
simultaneous switching of multiple outputs creates higher current
swings that may cause additional propagation delay (“push-out”) or a
decrease in propagation delay (“pull-in”). These SSO effects may impact
the setup and/or hold times and are not always taken into account by
simulations. System timing budgets should include margin for SSO
effects.
Stub The branch from the bus trunk terminating at the pad of an agent.
Trunk The main connection, excluding interconnect branches, from one end
System Management BusA two-wire interface through which various system components may
communicate.
Undershoot The minimum voltage extending below VSS observed for a signal at the
device pad.
V
CC
(CPU core) V
CC
(CPU core) is the core power for the processor. The system bus is
terminated to V
CC
(CPU core).
Victim A network that receives a coupled crosstalk signal from another network
is called the victim network.
Table 1 defines the acronyms used throughout this document.
Table 1. Acronyms (Sheet 1 of 3)
Acronym Definition
AC Audio Codec
ACPI Advanced Configuration and Power Interface
AGTL Assisted Gunning Transceiver Logic
AMC Audio/Modem Codec.
ASF Alert Standard Format
AMI American Megatrends Inc. (BIOS developer)
ATA Advanced Technology Attachment (disk drive interface)
ATX Advance Technology Extended (motherboard form factor)
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