TQ TQMaX4X Series, Prelimenary Manual

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Preliminary Preliminary User's Manual l TQMaX4XxL UM 0001 l © 2022, TQ-Systems GmbH Page 35
7.1 Acronyms and definitions (continued)
Table 43: Acronyms (continued)
Acronym Meaning
n.a. Not Available
NC Not Connected
PCB Printed Circuit Board
PCMCIA People Can’t Memorize Computer Industry Acronyms
PD Pull-Down
PHY Physical (layer of the OSI model)
PMIC Power Management Integrated Circuit
PRCM Power and Clock Management
PU Pull-Up
PWM Pulse-Width Modulation
RC Resistor-Capacitor
REACH
®
Registration, Evaluation, Authorisation (and restriction of) Chemicals
RF Radio Frequency
RFU Reserved for Future Usage
RGB Red Green Blue
RGMII Reduced Gigabit Media Independent Interface
RMII Reduced Media Independent Interface
RoHS Restriction of (the use of certain) Hazardous Substances
ROM Read-Only Memory
RTC Real-Time Clock
SD Secure Digital
SDIO Secure Digital Input Output
SDRAM Synchronous Dynamic Random Access Memory
SPI Serial Peripheral Interface
UART Universal Asynchronous Receiver/Transmitter
UM User's Manual
USB Universal Serial Bus
WEEE
®
Waste Electrical and Electronic Equipment
WP Write-Protection
WXGA Wide Extended Graphics Array