Design Files
1 design file
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Design Files - miscellaneous
KW41Z/31Z/21Z Design in check-list
Kinetis® KW31Z-2.4 GHz Bluetooth Low Energy Wireless Radio Microcontroller (MCU) based on Arm® Cortex®-M0+ Core
KW31Z Receive alerts
Note: QN9090/30 is preferred for any new Bluetooth LE design. No new software releases planned
The KW31Z is an ultra-low-power, highly-integrated single-chip device that enables Bluetooth® low energy v4.2 RF connectivity for portable, extremely low-power embedded systems. Applications include portable healthcare devices, wearable sports and fitness devices, AV remote controls, computer keyboards and mice, gaming controllers, access control security systems, smart energy and home area networks.
The KW31Z Wireless MCU integrates a 2.4 GHz transceiver supporting FSK/GFSK modulations, an Arm® Cortex®-M0+ CPU, up to 512 KB Flash and up to 128 KB SRAM, Bluetooth Low Energy Link Layer hardware, hardware security and peripherals optimized to meet the requirements of the target applications.
Product Details
Block Diagram
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 mm48-pin Laminate QFN | FRDM-KW41ZUSB-KW41Z |
| MKW41Z256VHT4 | 256 KB Flash,64 KB SRAM | |||
| MKW41Z512CAT4R | 512 KB Flash,128 KB RAM | 3.9 mm x 3.8 mm75-pin WLCSP | ||
| MKW31Z512VHT4 | Bluetooth Low Energy | 512 KB Flash,128 KB RAM | 7 mm x 7 mm x 1 mm48-pin Laminate QFN | |
| MKW31Z256VHT4 | 256 KB Flash,64 KB SRAM | |||
| MKW31Z512CAT4R | 512 KB Flash,128 KB RAM | 3.9 mm x 3.8 mm75-pin WLCSP | ||
| MKW21Z512VHT4 | IEEE 802.15.4 | 512 KB Flash,128 KB RAM | 7 mm x 7 mm x 1 mm48-pin Laminate QFN | |
| MKW21Z256VHT4 | 256 KB Flash,64 KB SRAM |
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
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Data Sheet
MKW41Z/31Z/21Z Data Sheet
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Reference Manual
MKW41Z/31Z/21Z Reference Manual
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Application Note
FRDM-KW41Z RF System Evaluation Report for 802.15.4 Applications
Design Resources
Hardware
5 hardware offerings
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Evaluation and Development BoardsFreedom Development Kit for Kinetis® KW41Z/31Z/21Z MCUsFeatured
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Emulators, Probes, and ProgrammersLPC-Link2
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Emulators, Probes, and ProgrammersUniversal Multilink FX High-Speed Development Interface
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Additional hardware available. View our featured partner solutions.
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Evaluation and Development BoardsBluetooth Low Energy/IEEE® 802.15.4 Packet Sniffer/USB Dongle
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Reference DesignKW41Z Power Amplifier Reference Design
Software
1-5 of 10 software files
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Development IDEs and Build Tools
Design Studio Integrated Development Environment (IDE)Featured
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BSPs and Device Drivers
Open-CMSIS-Packs
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Code Snippets
MCU Bootloader for NXP Microcontrollers
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Additional software available. View our featured partner solutions.
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Connectivity Software
Kinetis KW41Z Connectivity Software
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Connectivity Software
Test Tool for Connectivity Products
Note: For better experience, software downloads are recommended on desktop.
Engineering Services
To get further assistance directly from NXP, please see our Engineering Services.
1-5 of 15 engineering services
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Independent Design House (IDH)
Hardware Design Services
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Independent Design House (IDH)
Wireless design services
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Independent Design House (IDH)
Low Power RF
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Independent Design House (IDH)
Hardware/Software Engineering Services
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Independent Design House (IDH)
Debug Tool development
To find a complete list of our partners that support this product, please see our Partner Marketplace.
Training
3 trainings
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On-Demand Webinar
ARM® CORTEX®-M0+
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On-Demand Webinar
Developing with FreeRTOS
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On-Demand Webinar
NXP MQX RTOS