Secure Boot & Security Firmware Guide

Firmware Features

Hardware-rooted security mechanisms ensuring only authenticated firmware runs on the device. Essential for protecting against unauthorized code execution and tampering.

Key Topics

Chain of trust
Hardware root of trust
Image signing (ECDSA/RSA)
Secure key storage
ARM TrustZone
CryptoCell integration

Supported Hardware

nRF52840

Advanced multiprotocol SoC with 1MB Flash, 256KB RAM, and USB support. The go-to chip for Bluetooth 5.4, Thread, Zigbee, and 802.15.4 applications.

View platform

nRF5340

Dual-core Bluetooth 5.4 SoC with dedicated application and network processors. 1MB Flash + 512KB RAM on the application core, with hardware security via ARM TrustZone.

View platform

nRF9160

Cellular IoT SiP with integrated LTE-M/NB-IoT modem and GPS. Perfect for asset tracking, remote monitoring, and any application requiring wide-area connectivity.

View platform

STM32H7

Highest-performance STM32 series with ARM Cortex-M7 running at 480 MHz. Ideal for graphics, AI inference, and complex signal processing at the edge.

View platform

STM32L4

Ultra-low-power ARM Cortex-M4 series optimized for battery-operated applications. Features multiple low-power modes and efficient wake-up capabilities.

View platform

nRF52811

BLE 5.4 SoC with optional 802.15.4 and ANT support plus long-range mode (Coded PHY). Extends nRF52810 with Thread and extended-range BLE capability.

View platform

nRF52820

BLE 5.4 and 802.15.4 SoC with USB 2.0 Full Speed and 256KB Flash. Bridges BLE/Thread wireless with USB at lower cost than the nRF52840.

View platform

nRF52833

Full-featured BLE 5.4 + 802.15.4 SoC with 512KB Flash, 128KB RAM, USB, and NFC. Offers extended-range BLE (Coded PHY) and mid-range capability between nRF52832 and nRF52840.

View platform

nRF54H20

High-performance multicore SoC with dual Cortex-M33 (application + radio) plus a RISC-V VPR core. 2MB Flash and 1MB RAM, designed for complex multiprotocol BLE + 802.15.4 applications.

View platform

nRF54L05

Entry-level nRF54L series SoC with ARM Cortex-M33 and RISC-V co-processor. Ultra-low-power BLE 5.4 with 512KB Flash — the most affordable chip in the nRF54L family.

View platform

nRF54L10

Mid-range nRF54L series SoC combining ARM Cortex-M33 with a RISC-V co-processor. 1MB Flash and 128KB RAM with BLE 5.4, targeting wearables and connected sensors.

View platform

nRF54LM20

The flagship nRF54L series SoC built on a 22nm process, featuring a 128 MHz ARM Cortex-M33 + RISC-V co-processor with 2MB Flash and 512KB RAM — the largest memory in the nRF54L family. Supports Bluetooth LE, Matter, Thread, Zigbee, and 2.4 GHz proprietary protocols up to 4 Mbps. The nRF54LM20A variant adds 66 GPIOs and high-speed USB; the nRF54LM20B adds an integrated Axon NPU for hardware-accelerated Edge AI inference. Security includes TrustZone, CRACEN cryptographic engine with side-channel protection, and tamper detection.

View platform

nRF9131

Ultra-compact LTE-M/NB-IoT SiP (System-in-Package) with DECT NR+ support and GNSS. The smallest form-factor nRF91 series chip for space-constrained cellular IoT designs.

View platform

nRF9151

LTE-M/NB-IoT SiP with integrated GNSS, DECT NR+, and extended temperature support. An improved nRF9160 successor with lower power consumption and industrial-grade temperature range.

View platform

nRF9280

DECT NR+ and LTE-M/NB-IoT SiP designed for the unlicensed 1.9 GHz DECT band. Enables high-speed, low-latency local-area wireless for industrial automation and smart factory applications.

View platform

More Firmware Features

Frequently Asked Questions

AI-Powered

Start building with Secure Boot & Security

Generate firmware documentation and code scaffolds optimized for Secure Boot & Security development on your chosen hardware platform.