The TWR-KW2x is the development tool for the Kinetis® KW2x MCU devices, Our next-generation IEEE® 802.15.4 smart radio platform.Kinetis KW2x MCUs are a low-power, compact integrated family of devices consisting of a high-performance 2.4 GHz IEEE 802.15.4 compliant radio transceiver and a powerful Arm® Cortex®-M4 core system with connectivity and precision mixed-signal analog peripherals.There are two development hardware options: * Use TWR-KW21D256 for MKW21D256V and MKW21D512V * Use TWR-KW24D512 for MKW22D512V and MKW24D512V