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User's Manual l MBa335x UM 0202 l © 2018, TQ-Systems GmbH
Page 56
Acronyms (continued)
Acronym
Meaning
n.c.
Not Connected
NOR
Not-Or
NP
Not Placed
OTG
On-The-Go
PCB
Printed Circuit Board
PCIe
Peripheral Component Interconnect express
PCMCIA
People Can’t Memorize Computer Industry Acronyms
PD
Pull-Down
PHY
Physical (OSI model layer)
PMIC
Power Management Integrated Circuit
PRU
Programmable Real-Time Unit
PU
Pull-Up
REACH
®
Registration, Evaluation, Authorisation (and restriction of) Chemicals
RGMII
Reduced Gigabit Media Independent Interface
RJ45
Registered Jack 45
RMS
Root Mean Square
RoHS
Restriction of (the use of certain) Hazardous Substances
RS-232, RS-485
Recommended Standard (serial interface)
RTC
Real-Time Clock
SD card
Secure Digital card
SD/MMC
Secure Digital Multimedia Card
SDRAM
Synchronous Dynamic Random Access Memory
SIM
Subscriber Identification Module
SMD
Surface-Mounted Device
SMT
Surface-Mount Technology
SPI
Serial Peripheral Interface
THD
Through-Hole Device
THT
Through-Hole Technology
UART
Universal Asynchronous Receiver/Transmitter
UIM
User Identity Module
USB
Universal Serial Bus
WEEE
®
Waste Electrical and Electronic Equipment
WLAN
Wireless Local Area Network
WP
Write-Protection
WPAN
Wireless Personal Area Network
WWAN
Wireless Wide Area Network