Glossary

nRF9151 Hardware Design Guidelines

The glossary contains terms and acronyms that are used in this document.

Band-Pass Filter (BPF)

An electronic device or circuit that passes frequencies within a certain range and rejects frequencies outside that range.

BPF

Cat-M1

LTE-M User Equipment (UE) category with a single RX antenna, specified in 3GPP Release 13.

Cat-NB1

NB-IoT User Equipment (UE) category with 200 kHz UE bandwidth and a single RX antenna, specified in 3GPP Release 13.

Cat-NB2

An upgraded version of Cat-NB1, specified in 3GPP Release 14.

DECT NR+

A non-cellular radio standard included as part of the 5G standards by the ITU.

DECT NR+

Electromagnetic Interference (EMI)

Electromagnetic noise or energy that causes disturbance and unwanted effects that interfere with the operation of an electrical circuit.

EMI

Electrostatic Discharge (ESD)

A sudden discharge of electric current between two electrically charged objects.

ESD

Embedded SIM (eSIM)

A form of programmable Subscriber Identity Module (SIM) that is embedded directly into a device.

eSIM

Embedded Trace Macrocell (ETM)

A real-time trace module providing instruction and data tracing of a processor.

ETM

Error Vector Magnitude (EVM)

A measure used to quantify the performance of a digital radio transmitter or receiver.

EVM

Extended Discontinuous Reception (eDRX)

A method to conserve the battery of an IoT (Internet of Things) device by allowing it to remain inactive for extended periods.

eDRX

Firmware-Over-The-Air (FOTA)

A firmware update performed remotely over the air (OTA).

FOTA

General-Purpose Input/Output (GPIO)

A digital signal pin that can be used as input, output, or both. It is uncommitted and can be controlled by the user at runtime.

GPIO

GPIOTE

General-Purpose Input/Output Tasks and Events

Global Navigation Satellite System (GNSS)

A satellite navigation system with global coverage. The system provides signals from space transmitting positioning and timing data to GNSS receivers, which use this data to determine location.

GNSS

Global Positioning System (GPS)

A satellite-based radio navigation system that provides its users with accurate location and time information over the globe.

GPS

Human Body Model (HBM)

Simulates a charged person discharging to ground through a circuit.

HBM

Instrumentation Trace Macrocell (ITM)

An application-driven trace source that supports printf() style debugging to trace operating system and application events and generates diagnostic system information.

ITM

Integrated Circuit (IC)

A semiconductor chip consisting of fabricated transistors, resistors, and capacitors.

IC

Internet of Things (IoT)

Physical objects that are embedded with sensors, processing ability, software, and other technologies that connect and exchange data with other devices and systems of the Internet or other communications networks.

IoT

Long-Term Evolution (LTE)

A wireless broadband communication standard for mobile devices and data terminals, based on the GSM/EDGE and UMTS/HSPA technologies. 

LTE

Low-Noise Amplifier (LNA)

In a radio receiving system, an electronic amplifier that amplifies a very low-power signal without significantly degrading its signal-to-noise ratio.

LNA

Narrowband Internet of Things (NB-IoT)

A narrowband technology standard with longer range, lower throughput, and better penetration in, for example, cellars and parking garages compared to LTE-M. NB-IoT is most suitable for static, low throughput applications like smart metering, smart agriculture, and smart city applications. Also known as E-UTRAN (NB-S1), Cat-NB1, and Cat-NB2.

NB-IoT

Non-Terrestrial Network (NTN)

A 3GPP communication system that delivers wireless connectivity using satellites, drones, or high-altitude platforms instead of ground-based infrastructure.

NTN

MIPI RF Front-End Control Interface (RFFE)

A dedicated control interface for the RF front-end subsystem. MIPI Alliance

MIPI RFFE

Over-the-Air (OTA)

Refers to any type of wireless transmission. For Matter, OTA is synonymous with the Over-the-Air software update mechanism.

OTA

Power Amplifier (PA)

A device used to increase the transmit power level of a radio signal.

PA

Power Management Integrated Circuit (PMIC)

A chip used for various functions related to power management.

PMIC

Power Saving Mode (PSM)

A feature introduced in 3GPP Release 12 to improve battery life of IoT (Internet of Things) devices by minimizing energy consumption. The device stays dormant during the PSM window.

PSM

Production Test Image (PTI)

A modem firmware version used in the device manufacturing phase.

PTI

Programmable Peripheral Interconnect (PPI)

Enables peripherals to interact autonomously with each other using tasks and events independent of the CPU.

PPI

Release Assistance Indication (RAI)

A 3GPP feature that allows an LTE-M or NB-IoT device to indicate to the eNB that it has no more UL data and that the device does not anticipate receiving further DL data.

RAI

Right Hand Circular Polarization (RHCP)

Circular polarization in which the electric field vector rotates in a right-hand sense with respect to the direction of propagation.

RHCP

Serial Peripheral Interface (SPI)

Synchronous serial communication interface specification used for short-distance communication.

SPI

Serial Wire Debug (SWD)

A standard two-wire interface for programming and debugging Arm® CPUs.

SWD

Subscriber Identity Module (SIM)

A card used in User Equipment (UE) containing data for subscriber identification.

SIM

System in Package (SiP)

Several integrated circuits, often from different technologies, enclosed in a single module that performs as a system or subsystem.

SiP

System on Chip (SoC)

A microchip that integrates all the necessary electronic circuits and components of a computer or other electronic systems on a single integrated circuit.

SoC

Tracking Area Update (TAU)

A procedure initiated by the User Equipment (UE) when moving to a new tracking area in the LTE (Long-term Evolution) system.

TAU

Universal Integrated Circuit Card (UICC)

A new generation Subscriber Identity Module (SIM) used in User Equipment (UE) for ensuring the integrity and security of personal data.

UICC

Universal Subscriber Identity Module (USIM)

A card used in User Equipment (UE) containing data for subscriber identification.

USIM

User Equipment (UE)

Any device used by an end-user to communicate. The UE consists of the Mobile Equipment (ME) and the Universal Integrated Circuit Card (UICC).

UE