Freescale-Kinetis-K20-72-MHz-MCU-Tower-System-Module-Freescale-TWR-K20D72M-The-K20D72M-Tower-MCU-Module-TWR-K20D72M-is-a-low-cost-evaluation-demonstration-&-development-board-which-features-the-Kinetis-K20-72 M Hz-low-power-microcontroller-These-devices-are-based-on-the-ARM-Cortex™-M4-architecture-with-USB (Universal Serial Bus)-2-0-full-speed-OTG-controller-The-TWR-K20D72M-microcontroller-module-can-operate-in-st&-alone-mode-or-as-part-of-the-Freescale-Tower-System-a-modular-development-platform-that-ena