微控制器特殊应用, 32位, 48 MHz, 128 KB RAM/256 KB编程, 1.71 V至3.6 V输入, QFN-48
Overview
The KW21Z is an ultra low-power, highly-integrated single-chip device that enables IEEE® 802.15.4 RF connectivity for portable, extremely low-power embedded systems. Applications include portable health care devices, access control, security systems, smart energy and home area networks.
The KW21Z Wireless MCU integrates a 2.4 GHz transceiver supporting O-QPSK modulations, an Arm® Cortex®-M0+ CPU, up to 512 KB Flash and up to 128 KB SRAM, 802.15.4 packet processor, hardware security and peripherals optimized to meet the requirements of the target applications. The KW21Z is an ideal solution for single chip Thread devices including routers and end devices as well as border routers when adding connectivity for communicating with the cloud.
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## Features
### 802.15.4 Radio Features
* IEEE® Std. 802.15.4-2011 Standard Compliant
* Typical Receiver Sensitivity 802.15.4 = -100 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: 6.8/6.1 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
* Thread, 802.15.4 MAC and SMAC
* Kinetis® Software Development Kit SDK
* FreeRTOS kernel and a bare-metal non-preemptive task scheduler
* Support for MCUXpresso and IAR
## Features 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
| 256 KB Flash,64 KB SRAM
