Term Description
3A Auto-focus, Auto-white-balance, Auto-exposure
AC Alternating Current
API Application Programming Interface
BIOS Basic Input Output System
BSP Board Support Package
CC Configuration Channel - relates to USB Type-C connectors
CSE Converged Security Engine - responsible for retrieving and validating all firmware
CSI Camera Serial Interface
DC Direct Current
DPTF Intel Dynamic Platform and Thermal Framework
DRI Direct Rendering Infrastructure
DSI Display Serial Interface
EEPROM Electrically Erasable Programmable Read-Only Memory
EMI Electromagnetic Interference
eMMC Embedded MultiMedia Card
EFI Extensible Firmware Interface
ESD Electrostatic Discharge
FFC Flexible Flat Cable
FPC Flexible Printed Circuit
GDB GNU Debugger
GPIO General Purpose Input/Output
GPU Graphics Processing Unit
GRD Ground
HDMI High Definition Multimedia Interface
HPD Hot Plug Detection
HW Hardware
I2C Inter-Integrated Circuit - also known as "I-squared-C bus"
I2S Inter-IC Sound - also known as "I-squared-S bus"
IC Integrated Circuit
IDE Integrated Development Environment
IoT Internet of Things
IPU Image Processing Unit
IS Input System to IPU
ISP Image Signal Porecessing
LCD Liquid Crystal Display
LED Light Emitting Diode
LPDDR Low Power Double Data Rate
LPSS Low Power Subsystem
LPS Limited Power Source
MFP Multi Function Peripheral
MIPI MIPI Alliance (
NC No Connect - signal is not used or is to be left floating
Net names

Signals on the printed circuit board are often referred to by their signal, or net name. The name of a signal often changes when passing through a device.

OS Operating System
OSC Oscillator
OTG On the Go - specifically related to the USB On-the-Go technology. OTG ports are required to provide a minimum power to devices.
PCB Printed Circuit Board
PCM Pulse Code Modulation
pF Picofarads - unit of electrical capacitance
PHY Physical Layer
PMIC Power Management Integrated Circuit
PoP Package on Package
PS Processing System to IPU
PTC Positive Temperature Coefficient - a kind of fuse
PWA Printed Wire Assembly
PWM Pulse Width Modulation
ROS Robot Operating System -
RTC Real Time Clock
RTD3 Run Time D3 - a device low power state (D3hot).
Device is in lowest power state where it is still accessible by SW, unlike in D3cold where power is off completely.
RxD Receive Data
SCU System Controller Unit
SDCard Secure Digital Card (
SDIO Secure Digital Input Output
SoC System on Chip
SoM System on Module
SPI Serial Peripheral Interface
SW Software
TDP Thermal Design Power
TxD Transmit Data
TMDS Transition Minimized Differential Signalling
UART Universal Asynchronous Receiver / Transmitter
UDC USB Device Controller
UEFI Universal Extensible Firmware Interface
USB Universal Serial Bus -
UVC USB Video Class
XTAL Crystal
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