KW45’s three-core architecture integrates a 96 MHz CM33 application core, dedicated CM3 radio core and an isolated EdgeLock Secure Enclave. The Flash-based radio core with dedicated SRAM delivers a highly configurable and upgradeable software-implemented radio, freeing resources on the main core for customer application space.
The Bluetooth Low Energy 5.3-compliant radio supports up to 24 simultaneous secure connections. The EdgeLock Secure Enclave’s isolated execution environment provides a set of cryptographic accelerators, key store operations and secure lifecycle management that minimizes main core security responsibilities.
The KW45 MCU additionally integrates FlexCAN, helping enable seamless integration into an automobile’s in-vehicle or industrial CAN communication network. The FlexCAN module can support CAN’s flexible data rate (CAN FD) for increased bandwidth and lower latency.
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KW45 Block Diagram
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KW45 Architecture Block Diagram
Documents
- Reference Manual
- Datasheet
- Errata
- Secure Reference manual**
Security Certifications
Regulatory Certifications
- RED Certification
- EUROPEAN UNION DECLARATION OF CONFORMITY (EVK)
- EUROPEAN UNION DECLARATION OF CONFORMITY (LOC)
- Japan MIC KW45-LOC _TELEC-20250221
Bluetooth Qualifications
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
Evaluation boards
- KW45
- KW45-EVK
- KW45-EVK Schematic
- KW45-EVK Design Files
- KW45-EVK User manual
- KW45-LOC User manual
- KW45-EVK Getting Started
Application Notes
Software, Hardware and Peripherals:
- AN14122 : How to use RTC on KW45 This application note describes how to configure and use the RTC peripheral in a BLE demo
- AN14141 : Enabling Watchdog Timer Module on KW45 Bluetooth Low Energy Connectivity Stack This application note describes the process to implement the WDOG timer in a Connectivity Stack demo.
- AN13855 : KW45/K32W1 Integrating the OTAP Client Service into a Bluetooth LE Peripheral Device This Application note provides the steps and process for integrating the Over the Air Programming Client Service into a BLE peripheral device.
- AN13584 : Kinetis KW45 and K32W1 Loadpull Report This application note describes measurement methodology and associated results on the load-pull characteristics.
- AN13860 : Creating Firmware Update Image for KW45/K32W1 using OTAP tool This application note provides the steps to create and upgrade the image on the KW45 board via OTAP.
- AN14077 : Steps to migrating KW45 (1MB) to KW45 (512kB) This application note describes the initial steps require to migrate from 1MB flash to 512kB flash.
- AN14746 : EEPROM Emulation for the KW45B41Z and K32W148 This document describes the process for the EEPROM emulation for the KW45B41Z and K32W148.
- AN14298 32kHz Cystal-Less Mode on KW45: This application note provides information on the 32 kHz Crystal-less mode on the KW45 device. This mode allows you to reduce the cost of the system, without compromising the 32 kHz clock accuracy.
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AN13227 Hardware Design Considerations for KW45B41Z and K32W148 Bluetooth LE Devices: This application note describes printed-circuit board (PCB) design considerations for the KW45B41Z83AFTA, and KW45B41Z82AFTA and K32W1480VFTAT MKW35A, MKW36A, MKW35Z, and MKW36Z 40-pin HVQFN (6x6) and 48-pin Laminated QFN (HVLQFN-7x7 pitch 0.5 mm) wettable flank) package and KW45B41Z83AFPA and KW45B41Z82AFPA MKW35A, MKW36A, MKW35Z, and MKW36Z 40-pin HVQFN (6x6) and 40-pin Laminated QFN (HVLQFN-6x6 pitch 0.5 mm) wettable flank) package
Power Management:
- AN13230: Kinetis KW45 and K32W1 Bluetooth LE Power Consumption Analysis This application note provides information about the power consumption of KW45 wireless MCUs, the hardware design and optimized for low power operation.
- AN13831: KW45/K32W1 Power Management Hardware This application note describes the usage of the different modules dedicated to power management in the KW45/K32W1 MCU.
- AN14664 Coin cell Hardware Recommendations for Kinetis Bluetooth LE Applications: This document describes some hardware and software solutions to minimize the peaks of current at the coin cell level
RF:
- AN13687 : K32W1 Connectivity test for 802.15.4 Application This application note describes how to use the connectivity test tool to perform K32W1 802.15.4 RF performance.
- AN13728 : KW45 RF System Evaluation Report for Bluetooth LE and IEEE 802.15.4 Applications This application note provides the radio frequency evaluation test results of the KW45 board for BLE (2FSK modulation) and for IEEE 802.15.4 (OQPSK modulation) applications. Also describes the setup and tools that can be used to perform the tests.
- AN14098: KW45-LOC RF Test Report This application note provides basic RF test result of the KW45B41Z localization board.
- AN13228 : KW45-EVK RF System Evaluation Report for BLE Applications This application note provides the RF evaluation test result of the KW45B41Z-EVK for BLE application using two frequency Shift Keying modulation.
- AN13229 : KW45-EVK Co-existence with RF System Evaluation Report for BLE application This application note provides the RF evaluation test results of the KW45B41Z-EVK for BLE application (2FSK modulation)
- AN13512 : Kinetis Wireless Family Products BLE Coexistence with Wi-Fi Application This application note provides the K32W1/4X low energy family products immunity on Wi-Fi signals and methods to improve coexistence with Wi-Fi
- AN14294 : Out of Band Implementation with KW45 This document explains the steps required to set up an Out of Band (OOB) pairing connection between two KW45 EVK boards, using UART and CAN communication interfaces to share OOB data.
- AN2731 Compact Planar Antennas for 2.5GHz 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
- AN14645 How to Use Random Static Device Address for Bluetooth Application: This document introduces how to enable Random Static Device Address for a Bluetooth Low Energy application. The default device address type in the SDK is Public Device Address.
- AN14112 Car Connectivity Consortium (CCC) Digital Key R3 - Bluetooth LE Vehicle Keyless Access System: This document provides a hardware and software platform to implement a simple CCC Digital Key Release 3.0 system. The hardware and software components of this system allow the user to get familiar with the CCC Digital Keys R3 specification and how it can be implemented using NXP products and tools.
- AN13953 Integrating NFC Reader Library in a KW4X Bluetooth Low Energy Application: This document gives instructions on how to create a Bluetooth Low Energy (Bluetooth LE) project for the EVK-KW45 development board and MCUXpresso IDE, and how to integrate NFC Reader Library.
-
AN13049 Wi-Fi/Bluetooth/802.15.4 M.2 Key E Pinout Definition: This document defines M.2 usage for both NXP Wi-Fi/Bluetooth and Tri-Radio M.2 module design
Security:
- AN13859 : KW45/K32W1 In-System Programming Utility This application note provides steps to boot KW45/K32W1 MCU in ISP mode and establish various serial connections to communicate with the MCU.
- AN14003 : Programming the KW45 Flash for Application and Radio Firmware via Serial Wire Debug during mass production This application note describes the steps to write, burn and programming all the necessary settings via SWD in mass production.
- AN13883 : Updating KW45 Radio Firmware Via ISP Using SPSDK This application note provides steps to boot KW45/K32W1 MCU in ISP mode and update the radio firmware with secure binary.
- AN14109 : KW45 and K32W148 Secure Boot Using the SEC Tool This application note provides steps to do secure boot KW45/K32W1 MCU using signed images and secure binaries on the SEC GUI tool.
- AN13838 : KW45 and K32W148 Secure Boot Using the SPSDK Command line Tool This application note provides steps to do secure boot KW45/K32W1 MCU using signed images and secure binaries on the SPSDK command line tool.
- AN13931 : Managing Lifecycles on KW45 and K32W148 This application note provides steps to do transition lifecycles KW45/K32W1 MCU using the SEC GUI and SPSDK command line tools.
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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.
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AN14670 EdgeLock 2GO Provisioning via SPSDK for MCUs: This document offers an outline of the EdgeLock 2GO platform and discusses the “Device provisioning via proxy” flow. The document focuses on the initial device provisioning using secure objects from the EdgeLock 2GO cloud server.
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AN14624 EdgeLock 2GO Provisioning via Secure Provisioning Tool (SEC) for MCUs: This document offers an outline of the EdgeLock 2GO platform and discusses the "Device provisioning via proxy" flow.
Useful Links
[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.
Clock Measuring using the Signal Frequency Analyzer (SFA) module for KW45/KW47/MCXW71/MCXW72 - NXP C... : this community provides the steps on how to use the Signal Frequency Analyzer
The best way to build a PCB first time right with KW45 (Automotive) or K32W1/MCXW71 (IoT/Industrial)... Community : In this community provides the important link to build a PCB using a KW45 or K32W148 and MCXW71 and all concerning the radio performances, low power and radio certification (CE/FCC/ICC)
How to use the HCI_bb on Kinetis family products and get access to the DTM mode: This article is presenting two parts:
- How to flash the HCI_bb binary into the Kinetis product.
- Perform RF measurement using the R&S CMW270
BLE HCI Application to set transmitter/receiver test commands: This article provides the steps to show how user could send serial commands to the device.
Bluetooth LE HCI Black Box Quick Start Guide : This article describes a simple process for enabling the user controls the radio through serial commands.
Kinetis (../45/47/43;MCX W71/72/70) & MCX W23 Power Profile Tools (including Localization): This page is dedicated to the Kinetis (KW35/KW38/KW45/KW47/KW43) and MCX W7x (MCX W71/W72/W70) Power Profile Tools. It will help you to estimate the power consumption in your application (Automotive or IIoT) and evaluate the battery lifetime of your solution.
KW45/K32W1 32MHz & 32kHz Oscillation margins: this article provides the properly configuration for the Oscillation margins for the circuit.
KW45/MCXW71 Changing Clocking peripherals from FRO6M to other clock sources: This article provides a comprehensive guide to selecting and configuring alternative clock sources
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.
Demo (video)
KW45 Based CS 1 to Many Demo
NXP - Channel Sounding
Training
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
Development Tools
SDK builder: The MCUXpresso SDK brings open-source drivers, middleware, and reference example application to speed your software development.
SDK GitHub: SDK open-source Drivers, middleware and reference examples in Github
NXP MCUXpresso: MCUXpresso IDE offers advanced editing, compiling and debugging features with the addition of MCU-Specific debugging. Supports connections with all general-purpose Arm Cortex-M.
NXP SPSDK: Is a unified, reliable, and easy to use Python SDK library working across the NXP MCU portfolio providing a strong foundation from quick customer prototyping up to production deployment.
NXP SEC Tool: The MCUXpresso Secure Provisioning Tool us a GUI-based application provided to simplify generation and provisioning of bootable executables on NCP MCU devices.
NXP OTAP Tool: Is an application that helps the user to perform an over the air firmware update of an NXP development board.
Config Tool: MCUXpresso Config Tools, an integrated suite of configuration tools, these configuration tools allow developers to quickly build a custom SDK and leverage pins, clocks and peripheral to generate initialization C code or register values for custom board support.
SDK Examples for Wireless MCUs: The wireless examples feature many common Bluetooth configurations.
**For secure files is necessary to request additional access.
