KW47 family features a 96 MHz Arm® Cortex®-M33 core coupled with a Bluetooth LE subsystem. The independent radio subsystem, with a dedicated core and memory, offloads the main CPU, preserving it for the primary application and allowing firmware updates to support future wireless standards. The KW47 also offers advanced security with an integrated EdgeLock® Secure Enclave Core Profile and will be supported by NXP's EdgeLock 2GO cloud services for credential sharing.
The KW47 family includes Bluetooth Channel Sounding capabilities, with a dedicated on-chip Localization Compute Engine to reduce ranging latency. It incorporates additional memory to support application-specific code, connectivity stacks and over-the-air firmware updates. This delivers reliable wireless performance, as the real-time activities of the radio run on a separate core from the application.
Building on NXP's strong history of providing automotive solutions, the KW47 family offers a wide operating temperature range from -40 °C to 125 °C and peripherals for automotive applications, KW47 will be part of NXP's 15-year Product Longevity program to support long-term use.
The KW47 series is supported by the MCUXpresso Developer Experience to optimize, ease and help accelerate embedded system development.
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KW47 boards
- KW47-EVK
- Getting Started with the KW47 EVK
- KW47-EVK Board User Manual
- KW47-M2 Board User Manual
- KW47-EVK Quick Start Guide
- KW47-M2 Quick Start Guide
- KW47-LOC
- Getting Started with the KW47-LOC
- KW47-LOC Board User Manual
- KW47-LOC Quick Start Guide
- KW47: Bluetooth Channel Sounding MCU with On-Chip Localization Compute Engine the KW47
Security Certifications
- PSA Certified Level 2
- SESIP Level 2 Security Target
- SESIP Level 2 KW47/MCXW72
-
SESIP certificate and ST are on TrustCB website
-
Regulatory Certifications
- European Union Declaration of Conformity - KW47-EVK
- MIC Radio Certificate - KW47-EVK
- European Union Declaration of Conformity - KW47-LOC
- MIC Radio Certificate - KW47-LOC
Bluetooth Qualifications
-
Q360996: KW47 / MCX W72 Bluetooth LE 6.0 (Channel Sounding) Controller
- Q332147: KW47 / MCX W72 Bluetooth LE 6.0 (Channel Sounding) Host
Documents
Bluetooth
- Bluetooth® Low Energy Primer – Essential reading for understanding BLE fundamentals.
- Bluetooth® Specifications – Full list of standards, protocols, and technical documents.
- Awards and Recognition - Every year, the Bluetooth Special Interest Group (SIG) celebrates the hard work and commitment of working groups, committee members, and contributors who have been recognized by their peers as making a difference in advancing Bluetooth technology, like NXP!
2024: Channel Sounding
2025: Channel sounding amplitude-based attack resilience, LE test mode enhancements and Ranging profile and service.
- Bluetooth_5.0_Feature_Overview
- Bluetooth_5.1_Feature_Overview
- Bluetooth_5.2_Feature_Overview
- Bluetooth_5.3_Feature_Overview
- Bluetooth_5.4_Feature_Overview
- Bluetooth_6_Feature_Overview
- Bluetooth_6.1_Feature_Overview
- Bluetooth_6.2_Feature_Overview
- Bluetooth_6.3_Feature_Overview
Application Notes
Software, Hardware and Peripherals:
-
AN14884 32kHz Cristal-less mode on KW47: This application note provides information on the 32 kHz Crystal-less mode on the KW47 device. This mode allows you to reduce the cost of the system, without compromising the 32 kHz clock accuracy.
- AN14846 Boosting Application Performance with the KW47 Dual-Core Architecture: This application note describes how to use the dual-core architecture in the KW47 microcontroller to improve performance in generic embedded applications
- AN14796 Migration Guide from the KW45 to the KW47: This document describes the procedure to migrate from KW45B41Z to KW47 with emphasis on the connectivity software. The document is intended for software engineers, software testers, software integrators, and customers designing their own hardware.
Power Management:
- AN14709 Power Management Hardware for the KW47: This application note describes the usage of the different modules dedicated to power management in the KW47microcontroller. TheKW47integrates a DC-DC buck converter, a couple of low-dropout regulators, and a programmable solid-state switch to turn on/off theKW47power domains
- AN14684 Features, Usage, and Capabilities of Smart Power Switch on the KW47 Microcontroller: This application note describes the use of the smart power switch in the KW47 microcontroller. The KW47 integrates a programmable solid-state switch that turns connected components on or off, including KW47 power domains
- AN14664 Coincell Hardware Recommendations for Kinetis BLE Applications: his document describes some hardware and software solutions to minimize the peaks of current at the coin cell level
- AN14554 KW47 Bluetooth Low Energy Power Consumption Analysis: This document provides the power consumption analysis of the Kinetis KW47 (automotive) wireless MCU using the KW47-EVK board
RF:
- AN14719 Integrating the OTAP Client Service into a KW47 BLE Peripheral Device: This application note outlines the use of the NXP Over the Air Programming (OTAP) custom Bluetooth Low Energy (Bluetooth LE) service to upgrade software on a Microcontroller Unit (MCU) without using physical cables.
- AN14940 KW47 Coexistence with RF System Evaluation Report for the Bluetooth LE Applications: This document provides the coexistence RF evaluation test results of the KW47-EVK for Bluetooth LE applications (2FSK modulation). It includes the test setup description and the tools used to perform the tests on your own. For the KW47 radio parameters
- AN14461 KW47-EVK RF System Evaluation Report for Bluetooth LE Applications: This document provides the RF evaluation test results of the KW47-EVK board for Bluetooth LE (2FSK modulation) applications. It includes the test setup description and the tools used to perform the tests.
- AN14826 KW47-LOC System Evaluation Report for BLE Applications: This document provides the RF evaluation test results of the KW47 Localization board (KW47-LOC) for Bluetooth LE (2FSK modulation) applications. It includes the test setup description, and the tools used to perform the tests on your own.
- AN14696 Loadpull Test Report for KW47: This document explains the purpose of measuring the supply current, the transmit power, and the harmonics level. These measurements are monitored while the complex output load seen by the device under test (DUT) is tuned in amplitude and phase.
- AN14628 KW47 CCC Channel Sounding Power Profile Analysis: this document explains power consumption measurement at each step of the full distance measurement procedure, changing of the code to set the different option in the SDK software, and usage of the associated power profile estimator tool.
- AN14865 Channel Sounding Fundamentals for the KW47 and MCX W72: This document provides an overview of the fundamentals for CS technology and how it can be used for custom solutions and applications.
- AN14832 Fundamental Steps to Design a Channel Sounding Board - Creating a Simple PCB without Diversity: In this document, an example of a minimalistic CS subsystem is presented. Attention is paid to the Radio-Frequency (RF) path, since RF circuitry strongly influences the properties of the whole CS application.
- AN14779 Printed Channel Sounding Antennas for the KW47 and MCX W72: his application note is focused on printed antennas implemented on printed-circuit boards (PCB), designed by NXP for the KW47 and MCX W72 controllers
- AN14720 Creation of Firmware Update Image for KW47 using Over the Air Programming Tool: This document outlines the steps to create and upgrade the image on the KW47–EVK board
- AN14868 RF Modeling of Channel Sounding in ANSYS: focuses on techniques for simulating and analyzing channel sounding in wireless communication systems using ANSYS tools
- AN14855 Channel Sounding Tests in Different Environments: This application note is about Bluetooth Channel Sounding (CS), a technique for measuring the distance between two devices in the Bluetooth frequency band. It explains key factors affecting accuracy
- AN14869 Fundamental Steps to Design a Complex Channel Sounding Board: It focuses on creating hardware that supports advanced CS features, including antenna diversity and optimized RF paths, to improve accuracy and mitigate issues like multipath propagation.
- AN2731 Compact Planar Antennas for 2.4 GHz Communication: This document is not an exhaustive inquiry into antenna design. It is instead focused on helping the customers understand enough board layout and antenna basics to select a correct antenna type for their application, as well as avoiding typical layout mistakes that cause performance issues that lead to delays
Security:
- AN14727 KW47 Flash Encryption using NPX: There is an increasing requirement to protect the application code and data stored in flash memories in an encrypted form due to security reasons. The NVM PRINCE XEX (NPX) is a module inside the Flash Memory Controller (FMC) that allows customers to protect the contents of flash regions (up to four regions). It performs on-the-fly, low-latency encryption and decryption of flash contents, and it is transparent to the developer and to the Cortex-M33 platform. No special handle is needed from the perspective of the developer.
- AN14607 KW47 Secure Boot using SEC tool: The KW47 is a low-power, highly secure, single-chip wireless MCU, the contents of flash memory can be saved as encrypted data, which can be decrypted instantly. It helps in protecting the sensitive data and algorithms.
- AN14647 KW47-LOC In-System Programming Utility: The document provides steps to boot the KW47 MCU in ISP mode and establish various serial connections to communicate with the MCU
- AN14653 Debug Authentication on KW47: This application note describes the steps for debug authentication using the MCUXpresso Secure Provisioning Tool (SEC).
- AN14649 KW47-EVK In-System Programming Utility: This document provides steps to boot the KW47 MCU into ISP mode and establish various serial connections to communicate with the MCU.
- AN14643 KW47 Managing Lifecycles: This document describes the following: Lifecycle stages that are available to the user, how to access the lifecycles, limitations of the lifecycles, how to transition to the next lifecycle
-
AN15038 EdgeLock 2GO Provisioning MCUs via Product Type using Secure Provisioning (SEC) Tool: This document offers an outline of the EdgeLock 2GO platform and discusses the "Device provisioning via product type" flow. The document focuses on the initial device provisioning using secure objects from the EdgeLock 2GO cloud server.
Training
Bluetooth Low energy 6.0 NXP Introduction
KW4x: Automotive Bluetooth Low Energy MCUs for Secure Car Access
RF Switch Comparison Absorptive/Reflective
Standards Comparison ETSI / FCC / ARIB requirements
BLE Channel Sounding - Overview
BLE Channel Sounding - RF Hardware
BLE Channel Sounding - ANSYS Modeling Tools
BLE Channel Sounding - Antenna Prototypes Validation Measurements
Equipment
Wireless Equipment: This article provides the links to the Equipment that helps to the project development
Useful Links
How to run KW47-M2 standalone - NXP Community
How to generate a Standalone IAR toolchain project from MCUXSDK application example - KWX/MCWX
Debug probe firmware installation for the KW47-EVK and FRDM-MCXW72 This post will cover how to install the CMSIS-DAP/SEGGER J-link firmware for the KW47-EVK and FRDM-MCXW72 using NXP’s MCU-LINK installer.
Updating NBU for Wireless Examples on KW47/MCXW72This post will cover how to update the NBU firmware
How to import and run demo examples with MCUXpresso for Visual Studio Code: This article gives information on how to import and run demo examples from the new SDK with ARM GCC toolchain, in MCUXpresso for Visual Studio Code.
[MCUXSDK] How to use GitHub SDK for KW4x, MCXW7x, MCXW2x - NXP Community this community post provides step by step how to use GitHub SDK
[MCUXSDK] GitHub SDK - Documentation for Bluetooth LE platforms - NXP Community this community post provides the documentation for BLE platforms.
- How to flash the HCI_bb binary into the Kinetis product.
- Perform RF measurement using the R&S CMW270
Reference Designs
Bluetooth Ranging Access Vehicle Enablement System - NXP Community Blue Ravens (Bluetooth Ranging Access Vehicle Enablement System) is a system solution developed by NXP to assist customers in designing their own BLE-based car access solutions using NXP products.
Videos
NXP Channel Sounding technology interfacing with Google Pixel 10 This is a demo showing the MCX W72 LOC board interacting with Google Pixel 10 phone using channel sounding