The FRDM-K66F is a low cost development platform for Kinetis® K66, K65, and K26 MCUs.


The FRDM-K66F has been designed by NXP in collaboration with mbed for prototyping all sorts of devices, especially those requiring the size and price point offered by Cortex-M4.The board is well sized for low-power applications, thanks to its power efficient Kinetis K66 MCU featuring an ARM® Cortex®-M4 core running up to 180MHz and embedding 2MB Flash, 256KB RAM. Features on FRDM-K66F include but not limited to audio codec, digital MEMS microphone, dual-role high-speed USB, microSD card slot, Ethernet port and headers for use with Bluetooth® and 2.4 GHz radio add-on modules.The Kinetis K66 MCU family remains fully software, hardware and development tool compatibility with other Kinetis MCU and Freedom board families. It is packaged as a development board including extension headers compatible with Arduino R3 shields and includes a built-in USB Debug and Flash Programmer.

Pelion Ready

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The Freedom-K64F is an ultra-low-cost development platform for Kinetis K64, K63, and K24 MCUs.


Low-power, high-performance, Ethernet board enabling direct firmware update