Arm® Cortex®-M0+|Kinetis® KW31Z Bluetooth Low Energy 32-bit MCUs

Product Details

Block Diagram

Kinetis^® W Series KW31Z MCUs Block Diagram

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Features

Bluetooth Low Energy Radio Features

2.4 GHz Bluetooth Low Energy version 4.2 Compliant
Typical Receiver Sensitivity (Bluetooth Low Energy) = -95 dBm
Programmable Transmitter Output Power up to +3.5 dBm

Core and Memories

Up to 48 MHz Arm^® Cortex^®-M0+ core
Up to 512 KB Flash memory
Up to 128 KB SRAM
Excellent coexistence performance
Integrated balun to reduce system cost and PCB board area

Low Power Consumption and Operating Voltage Ranges

Nine low-power modes to provide power optimization based on application requirements
Typical Rx/Tx Current (DC/DC Enabled): 6.5 mA / 8.4 mA
Bypass Voltage: 1.71V to 3.6V
DCDC Converter Buck Configuration: 2.1V to 4.2V
DCDC Converter Boost Configuration: 0.9V to 1.795V

Analog modules

16-bit Analog-to-Digital Converter (ADC)
12-bit Digital-to-Analog Converter (DAC)
6-bit High Speed Analog Comparator (CMP)

Security

AES-128 Accelerator (AESA), True Random Number Generator (TRNG)

Supported Software

Bluetooth Low Energy Host Stack and Profiles
Generic FSK Link Layer Software
Kinetis^® Software Development Kit (SDK)
FreeRTOS kernel and a bare-metal non-preemptive task scheduler
Support for MCUXpresso and IAR

Comparison Table

Kinetis KW41Z Family Solutions

Part Number	Wireless Connectivity Protocol	Memory	Package Size	Hardware Development Tool
MKW41Z512VHT4	Bluetooth Low Energy and IEEE 802.15.4	512 KB Flash, 128 KB RAM	7 mm x 7 mm x 1 mm 48-pin Laminate QFN	FRDM-KW41Z USB-KW41Z
MKW41Z256VHT4		256 KB Flash, 64 KB SRAM	7 mm x 7 mm x 1 mm 48-pin Laminate QFN
MKW41Z512CAT4R		512 KB Flash, 128 KB RAM	3.9 mm x 3.8 mm 75-pin WLCSP
MKW31Z512VHT4	Bluetooth Low Energy	512 KB Flash, 128 KB RAM	7 mm x 7 mm x 1 mm 48-pin Laminate QFN
MKW31Z256VHT4		256 KB Flash, 64 KB SRAM	7 mm x 7 mm x 1 mm 48-pin Laminate QFN
MKW31Z512CAT4R		512 KB Flash, 128 KB RAM	3.9 mm x 3.8 mm 75-pin WLCSP
MKW21Z512VHT4	IEEE 802.15.4	512 KB Flash, 128 KB RAM	7 mm x 7 mm x 1 mm 48-pin Laminate QFN
MKW21Z256VHT4	IEEE 802.15.4	256 KB Flash, 64 KB SRAM	7 mm x 7 mm x 1 mm 48-pin Laminate QFN

MCUXpresso Software and Tools

MCUXpresso Config Tools – A comprehensive suite of system configuration tools, including pins, clocks, SDK builder and more.

MCUXpresso SDK – An open-source software development kit (SDK) built specifically for your processor and evaluation board selections.

MCUXpresso IDE – An easy-to-use integrated development environment (IDE) for creating, building, debugging, and optimizing your application.

Protocol Stacks

Connectivity Software

Kinetis Connectivity Software Version 1.0.1 includes the following components:

KW40Z Bluetooth^® low energy v4.2 stack, v1.1.4
KW40Z IEEE^® 802.15.4-2006/2011 MAC/PHY implementation v5.2.4
KW40Z Simple Media Access Controller (SMAC) v3.2.4
KW40Z-enabled Connectivity Framework

NXP Designs: Reference Design Library

Technical content and expertise to help jump start your design and get you to production faster.

Documentation

Quick reference to our documentation types.

1-5 of 13 documents

^{Data Sheet}
MKW41Z/31Z/21Z Data Sheet

PDFRev 4Apr 5, 20181.3 MBMKW41Z512English
^{Reference Manual}
MKW41Z/31Z/21Z Reference Manual

PDFRev 3Apr 5, 201821.3 MBMKW41Z512RMEnglish
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^{Application Note}
Compact Planar Antennas for 2.4 GHz Communication Designs and Applications within NXP EVK Boards

PDFRev 4Nov 11, 20204.5 MBAN2731English, 中文
^{Application Note}
FRDM-KW41Z RF System Evaluation Report for 802.15.4 Applications

PDFRev 1.2Mar 16, 20181.4 MBAN11999English
^{Application Note}
Hardware Design Considerations for MKW41Z/31Z/21Z BLE and IEEE 802.15.4 Devices

PDFRev 2Dec 8, 20171.7 MBAN5377English
^{Application Note}
FRDM-KW41Z RF System Evaluation Report for BLE Applications

PDFRev 1Nov 12, 20172.2 MBAN12059English
^{User Guide}
FRDM-KW41Z Quick Start Guide

PDFRev 4Oct 21, 2019642.1 KBFRDMKW41ZQRGEnglish
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^{User Guide}
FRDM-KW41Z Freedom Development Board User's Guide

PDFRev 1Aug 8, 20182.0 MBFRDMKW41ZUGEnglish
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^{User Guide}
FRDM-KW41Z Freedom Development Board

PDFRev 1May 20, 20181.9 MBFRDMKW41ZUGvC2English
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^{User Guide}
IoT Toolbox Mobile Application User Manual

PDFRev 0Dec 19, 20176.0 MBUM11087English
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^{User Guide}
USB-KW41Z Sniffer/Development Board User's Guide

PDFRev 1Jan 3, 2017700.3 KBUSBKW41ZUGEnglish
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^Errata
Mask Set Errata for Mask 1N16S

PDFRev 25 JUL 2019Aug 26, 2019145.6 KBKINETIS_W_1N16SEnglish
^{Fact Sheet}
Kinetis^® KW41Z/31Z/21Z Wireless MCUs - Fact Sheet

PDFRev 5Feb 27, 20203.4 MBKNTSKW41Z31Z21ZFSEnglish

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Design Resources

Design Files

1 design file

^{Design Files - miscellaneous}
KW41Z/31Z/21Z Design in check-list

XLSXRev 1Nov 21, 2017 17:22:0095.3 KBKW41Z-31Z-21Z-DESIGN-CHECK
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Hardware

5 hardware offerings

^{Evaluation and Development Boards}
Freedom Development Kit for Kinetis® KW41Z/31Z/21Z MCUsFeatured

FRDM-KW41Z
^{Emulators, Probes, and Programmers}
LPC-Link2

OM13054
^{Emulators, Probes, and Programmers}
Universal Multilink FX High-Speed Development Interface

U-MULTILINK-FX
Additional hardware available. View our featured partner solutions.
^{Evaluation and Development Boards}
Bluetooth Low Energy/IEEE^® 802.15.4 Packet Sniffer/USB Dongle

USB-KW41Z
^{Reference Design}
KW41Z Power Amplifier Reference Design

KW41Z-PA-RD

1-5 of 20 hardware offerings

^{Test Accessories and Debugger}
J-Link PLUSUPDATED

JTAG/SWD debug probe with USB interface. Based on a 32-bit RISC CPU, it can communicate at high speed with the supported target CPUs. J-Link is used around the world in t...

By SEGGER Microcontroller GmbH Gold Partner
^{Test Accessories and Debugger}
Universal Access Device 3+ (UAD3+)

The UAD3+, equipped with up to 4 GB of trace memory and powerful interfaces to target and host, is the right solution for trace, multicore debugging, profiling and code c...

By PLS Development Tools Gold Partner
^{Test Accessories and Debugger}
J-Link BASEUPDATED

Supercharge your IDE with the worlds fastest debug probe. The J-Link Flash download technology achieves a performance very close to the maximum speed possible. No other ...

By SEGGER Microcontroller GmbH Gold Partner
^{Test Accessories and Debugger}
Flasher CompactUPDATED

Flasher Compact is the compact twin to the Flasher PRO, primarily designed for installation into production rigs or automated test equipment (ATE) where production space ...

By SEGGER Microcontroller GmbH Gold Partner
^{Test Accessories and Debugger}
Flasher ARMUPDATED

In-Circuit-Flash-Programmer based on the J-Link family for production and in-field-service. Offers fastest flash algorithms available, multiple integration options (RS232...

By SEGGER Microcontroller GmbH Gold Partner
^{Test Accessories and Debugger}
Flasher Hub-12UPDATED

The Flasher Hub-12 controls up to 12 Flasher Compacts so that they program simultaneously, creating a powerful gang programmer for efficient high-speed parallel programmi...

By SEGGER Microcontroller GmbH Gold Partner
^{Test Accessories and Debugger}
J-Trace PRO Cortex-MUPDATED

J-Trace PRO for Cortex-M is setting a new standard for trace probes. It enables continuous streaming trace, lifting the limitations by internal buffers and slow data tran...

By SEGGER Microcontroller GmbH Gold Partner
^{Test Accessories and Debugger}
J-Link ULTRA+UPDATED

Builds atop the J-Link to further enhance the debug experience. The J-Link ULTRA+ is three times faster than the industry standard J-Link, at a 3 MBytes/s download speed ...

By SEGGER Microcontroller GmbH Gold Partner
^{Test Accessories and Debugger}
Flasher Portable PLUSUPDATED

Flasher Portable PLUS is an extremely portable flash programmer, specifically designed to meet the needs of production-grade flash programming in the field.

By SEGGER Microcontroller GmbH Gold Partner
^{Test Accessories and Debugger}
J-Link PRO PoEUPDATED

J-Link PRO PoE is SEGGER's specialized programming / debug probe for creating test farms. It can draw power via Ethernet and supplies power to the target either via debug...

By SEGGER Microcontroller GmbH Gold Partner
^{Test Accessories and Debugger}
J-Trace PRO CortexUPDATED

J-Trace PRO Cortex provides support for Cortex-A/R/M based microcontrollers. The SuperSpeed USB 3.0 interface of J-Trace PRO Cortex enables continuous streaming trace via...

By SEGGER Microcontroller GmbH Gold Partner
^{Test Accessories and Debugger}
J-Link PROUPDATED

J-Link PRO is an enhanced version of the SEGGER J-Link. This emulator supports ARM/Cortex devices. This has an Ethernet interface in addition to the USB interface. This ...

By SEGGER Microcontroller GmbH Gold Partner
^{Test Accessories and Debugger}
J-Link WiFiUPDATED

JTAG/SWD debug probe with WiFi interface. Based on a 32-bit RISC CPU, it can communicate at high speed with the supported target CPUs. J-Link is used around the world in ...

By SEGGER Microcontroller GmbH Gold Partner
^{Test Accessories and Debugger}
Flasher PROUPDATED

Flasher PRO is SEGGER’s “almost-anything” flash programmer for microcontrollers, SoCs, and (Q)SPI flashes.

By SEGGER Microcontroller GmbH Gold Partner
^{Test Accessories and Debugger}
Universal Access Device 2next (UAD2next

The (UAD2next) combines the state-of-the-art debugging features and CAN with trace capabilities. It can be extended by plugin trace modules supporting e.g. ARM CoreSight ...

By PLS Development Tools Gold Partner
^{Test Accessories and Debugger}
TRACE32® Debug and Trace tools for Arm®-based NXP MPUs/MCUs

TRACE32® provides a complete suite of tools for all NXP's Arm®-based microprocessors. All of these provide unparalleled levels of debug capabilities to get the best out o...

By Lauterbach GmbH Gold Partner
^{Test Accessories and Debugger}
Green Hills Probe

High speed on-chip download, run control and trace.

By Green Hills Software Platinum Partner
^{Test Accessories and Debugger}
Universal Access Device 2pro (UAD2pro)

The UAD2pro offers fast and flexible communication between Universal Debug Engine on the Host PC and the microcontroller target. Host interface is USB 2.0. Target interfa...

By PLS Development Tools Gold Partner
^{Test Accessories and Debugger}
TRACE32® CombiProbe 2 Compact Trace for NXP Microcontrollers

CombiProbe 2 enables full insight into what an embedded system is doing at run-time. Besides its comprehensive debug capabilities, the trace simplifies system profiling o...

By Lauterbach GmbH Gold Partner
^{Test Accessories and Debugger}
TRACE32® PowerDebug System for NXP Microcontrollers/Microprocessors

PowerDebug is Lauterbach's powerful, modular, flexible debug system. It provides the broadest coverage of supported chips and core architectures in the embedded industry ...

By Lauterbach GmbH Gold Partner

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To find a complete list of our partners that support this product, please see our Partner Marketplace.

Software

1-5 of 10 software files

^{Development IDEs and Build Tools}
Design Studio Integrated Development Environment (IDE)Featured

Download Options
^{BSPs and Device Drivers}
Open-CMSIS-Packs

Download Options
^{Code Snippets}
MCU Bootloader for NXP Microcontrollers

Download Options
Additional software available. View our featured partner solutions.
^{Connectivity Software}
Kinetis KW41Z Connectivity Software

EXERev 1.0.2Oct 11, 2016 00:00:0064556 KBKW41Z-CONNECTIVITY-SOFTWARE
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^{Connectivity Software}
Test Tool for Connectivity Products

EXERev 12.9.2.2Oct 2, 2020 08:29:0092.4 MBTest_Tool_12.9.2.2
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^{Connectivity Software}
Kinetis KW41Z Connectivity Software Linux

TGZRev 1.0.2Nov 16, 2016 00:00:00157733 KBKW41Z-CONNECTIVITY-SOFTWARE-LIN
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^{Debugging and Visualization Tools}
Kinetis Protocol Analyzer Adapter

EXERev 2.0.4Feb 20, 2021 12:24:0016.5 MBKinetis_Protocol_Analyzer_Adapter_2.0.4.1
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^{Debugging and Visualization Tools}
IoT Toolbox - Google Android app

HTMLRev 0May 8, 2019 00:00:0015 KBIoT-Toolbox-Google-Android-app

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^{Debugging and Visualization Tools}
IoT Toolbox – Apple iOS app

HTMLRev 0May 8, 2019 00:00:006 KBIoT-Toolbox-Apple-iOS-app

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^{Software Development Resources}
Bluetooth Developer Studio Plug-In

ZIPRev 1.0.0Oct 11, 2016 00:00:00171.1 KBBDS-PLUG-IN-FOR-KSDK
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Note: For better experience, software downloads are recommended on desktop.

Training

3 trainings

^{On-Demand Webinar}
ARM® CORTEX®-M0+

3 dayBy MOVE.B Gold Partner

^{On-Demand Webinar}
Developing with FreeRTOS

24 hrBy Embedded Labworks Registered Partner

^{On-Demand Webinar}
NXP MQX RTOS

24 hrBy Embedded Labworks Registered Partner

Kinetis® KW31Z-2.4 GHz Bluetooth Low Energy Wireless Radio Microcontroller (MCU) based on Arm® Cortex®-M0+ Core

Product Details

Block Diagram

Kinetis® W Series KW31Z MCUs Block Diagram

Features

Bluetooth Low Energy Radio Features

Core and Memories

Low Power Consumption and Operating Voltage Ranges

Analog modules

Security

Supported Software

Comparison Table

Kinetis KW41Z Family Solutions

MCUXpresso Software and Tools

Protocol Stacks

Connectivity Software

NXP Designs: Reference Design Library

Applications

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Smart Home

Documentation

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Design Resources

Design Files

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KW41Z/31Z/21Z Design in check-list

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Freedom Development Kit for Kinetis® KW41Z/31Z/21Z MCUsFeatured

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J-Link PLUSUPDATED

J-Link BASEUPDATED

Flasher CompactUPDATED

Flasher ARMUPDATED

Flasher Hub-12UPDATED

J-Trace PRO Cortex-MUPDATED

J-Link ULTRA+UPDATED

Flasher Portable PLUSUPDATED

J-Link PRO PoEUPDATED

J-Trace PRO CortexUPDATED

J-Link PROUPDATED

J-Link WiFiUPDATED

Flasher PROUPDATED

Software

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Design Studio Integrated Development Environment (IDE)Featured

Kinetis KW41Z Connectivity Software

Test Tool for Connectivity Products

Kinetis KW41Z Connectivity Software Linux

Kinetis Protocol Analyzer Adapter

IoT Toolbox - Google Android app

IoT Toolbox – Apple iOS app

Bluetooth Developer Studio Plug-In

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emFile (File System)UPDATED

emWin (GUI/Graphics Package)UPDATED

AWS IoT CoreNEW

embOS (RTOS)UPDATED

emSecure (Digital Signature Suite)UPDATED

TRACE32® Tool Qualification Kit (TQSK) for Functional Safety according to ISO 26262, DO-178C, IEC 61508, IEC 62304 and EN 50128NEW

SEGGER Embedded StudioUPDATED

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Kinetis^® KW31Z-2.4 GHz Bluetooth Low Energy Wireless Radio Microcontroller (MCU) based on Arm^® Cortex^®-M0+ Core

Kinetis^® W Series KW31Z MCUs Block Diagram