Intel 915GME user manual Acronyms Sheet 1, Acronym Definition

About This Manual—Mobile Intel® 915GME Express Chipset

	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.
	SSO	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 agent pad to the other end agent pad.
	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.
	VRD 10.0	The Voltage Regulator Module (a down on the board solution)
		specification for the Intel® Pentium® 4 Processor with HT
		Technology processor. It is a DC-DC converter module that
		supplies the required voltage and current to a single processor.
	Table 1 defines the acronyms used throughout this document.
Table 1.	Acronyms (Sheet 1 of 2)
	Acronym	Definition
	AC	Audio Codec
	ASF	Alert Standard Format
	AMC	Audio/Modem Codec.
	Anti-Etch	Any plane-split, void or cutout in a VCC or GND plane is referred to as an anti-etch
	CMC	Common Mode Choke
	CNR	Communications and Networking Riser
	EMI	Electro Magnetic Interference
	ESD	Electrostatic Discharge
	FS	Full-speed. Refers to USB
	HS	High-speed. Refers to USB
	ICH	I/O Controller Hub
	LOM	LAN on Motherboard
	LPC	Low Pin Count

	Mobile Intel® 915GME Express Chipset
April 2007	Development Kit User’s Manual
Order Number: 317230-001US	11