NXP 恩智浦Kinetis K50: 72MHz
Cortex?-M4 160/288KB Flash (80 pin)
Kinetis K50: 72MHz Cortex-M4 160/288KB Flash (80 pin) K50P81M72SF1 K50 Sub-Family Supports: MK50DX128CLK7, MK50DX256CLK7 Features ? Operating Characteristics – Voltage range: 1.71 to 3.6 V – Flash