Abbreviations

**Table B-1** Standard units of measure used in this developer note include:
A	amperes	MB	megabytes
cm	centimeters	Mbps	megabits per second
dB	decibels	Mbit	megabits
GB	gigabytes	MHz	megahertz
Hz	hertz	mm	millimeters
KB	kilobytes	ns	nanoseconds
kg	kilograms	V	volts
kHz	kilohertz	VDC	volts direct current
mA	milliamperes

**Table B-2** Other abbreviations used in this note include:
$n	hexadecimal value n
10Base-T	an Ethernet standard for data transmission at 10 Mbits per second
100Base-TX	an Ethernet standard for data transmission at 100 Mbits per second
A/D	analog to digital
AGP	accelerated graphics port
ANSI	American National Standards Institute
API	application programming interface
ATA	Advanced Technology Attachment
ATAPI	ATA Packet Interface
CAS	column address strobe
CAV	constant angular velocity
CD	compact disc
CD-ROM	compact disc read-only memory
CLV	constant linear velocity
CPU	central processing unit
D/A	digital to analog
DAA	data access adapter
DB-DMA	descriptor-based direct memory access
DDR	double data rate, a type of SDRAM
DIMM	Dual Inline Memory Module
DMA	direct memory access
DRAM	dynamic random-access memory
EDO	extended data out
EEPROM	electrically eraseable programmable ROM
EIDE	expanded integrated device electronics
G4	Generation 4, the fourth generation of PowerPC microprocessors, incorporating Altivec technology
GART	graphics address remapping table
GND	ground
HFS	hierarchical file system
HID	human interface device, a class of USB devices
IC	integrated circuit
IEC	International Electrotechnical Commission
IIC	inter IC control bus
IIS	inter IC sound bus
I/O	input and output
IR	infrared
ISO	International Organization for Standardization
JEDEC	Joint Electron Device Engineering Council
L1	level 1 or first level
L2	level 2 or second level
LAN	local area network
LED	light emitting diode
MAC	media access controller
Mac OS	Macintosh Operating System
modem	modulator-demodulator
NMI	nonmaskable interrupt
OHCI	Open Host Controller Interface
OS	operating system
PCI	Peripheral Component Interconnect
PLL	phase-locked loop
RAM	random-access memory
RCA	Radio Corporation of America
rms	root mean square
ROM	read-only memory
SCSI	Small Computer System Interface
SDRAM	synchronous dynamic RAM
SGRAM	synchronous graphics RAM
SNR	signal to noise ratio
SPD	Serial Presence Detect
THD	total harmonic distortion
THD+N	total harmonic distortion plus noise
USB	Universal Serial Bus
VCC	positive supply voltage (voltage for collectors)
Wi-Fi	wireless fidelity

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