Intel 317443-001US user manual Acronyms Sheet 1 of, Power-Good

About This Manual—Intel®945GME Express Chipset

	Power-Good	“Power-Good,” “PWRGOOD,” or “CPUPWRGOOD” (an active high
		signal) indicates that all of the system power supplies and clocks
		are stable. PWRGOOD should go active a predetermined time
		after system 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 Bus
		A 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.
	VCC (CPU core)	VCC (CPU core) is the core power for the processor. The system
		bus is terminated to VCC (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)
		Intel® CoreTM 2 Duo processor with the Mobile Intel® 945GME Express Chipset
May 2007		Manual
Order Number: 317443-001US		11