SMARC T335x Carrier Board Hardware Design Guide, Document Revision 1.2
Abbreviation
Explanation
PHY
Physical Layer of the OSI model
PMIC
Power Management IC, integrated circuit that manages
amongst others the power sequence of a system
PU
Pull Up Resistor
PWM
Pulse-Width Modulation
RGB
Red Green Blue, colour channels in common display interfaces
RJ45
Registered Jack, common name for the 8P8C modular
connector that is used for Ethernet wiring
RS232
Single ended serial port interface
RS422
Differential signaling serial port interface, full duplex
RS485
Differential signaling serial port interface, half duplex, multi
drop configuration possible
SD
Secure Digital, flash memory card
SDIO
Secure Digital Input Output, an external bus for peripherals that
uses the SD interface
SOC
System on a Chip, IC which integrates the main component of
a computer on a single chip
SPI
Serial Peripheral Interface Bus, synchronous four wire full
duplex bus for peripherals
TVS
Diode
Transient-Voltage-Suppression Diode, diode that is used to
protect interfaces against voltage spikes
UART
Universal Asynchronous Receiver/Transmitter, serial interface,
in combination with a transceiver a RS232, RS422, RS485,
IrDA or similar interface can be achieved
USB
Universal Serial Bus, serial interface for internal and external
peripherals
VDD
Positive supply voltage
VGA
Video Graphics Array, analogue video interface for monitors