The TWR-K21D50M module is a development board for the Kinetis(r) K11, K12, K21 and K22 MCUs, which are ideal for optimized, cost-sensitive security applications. This Tower(r) module is designed to enable rapid prototyping and development for applications requiring medium embedded memory densities, security through tamper detect and crypto unit and communication through USB. The TWR-K21D50M module operates as a standalone debug tool and can also be combined and used as part of the modular Tower System development platform.