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About This Manual
10
316704-001 / Development Kit User’s Manual
Term/Acronym Definition
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.
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.
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 Bus
A two-wire interface through which various system components may
communicate.
communicate.
Undershoot
The minimum voltage extending below VSS observed for a signal at the
device pad.
device pad.
VCC (CPU core)
VCC (CPU core) is the core power for the processor. The system bus is
terminated to VCC (CPU core).
terminated to VCC (CPU core).
Victim
A network that receives a coupled crosstalk signal from another network is
called the victim network.
called the victim network.
Table 3
defines the acronyms used throughout this document.
Table 3. Acronyms
Acronym Definition
AC Audio
Codec
ACPI
Advanced Configuration and Power Interface
ADD2
Advanced Digital Display 2
ADD2N
Advanced Digital Display 2 Normal
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)
BGA
Ball Grid Array