NXP 恩智浦Kinetis K51: 100MHz
Cortex?-M4 512KB Flash (121 pin)
Kinetis K51: 100MHz Cortex-M4 512KB Flash (121 pin) K51P121M100SF2V2 K51 Sub-Family Supports the following: MK51DX256CMC10, MK51DN512CMC10 Features ? Operating Characteristics – Voltage range: 1.71