NXP 恩智浦Kinetis K61: 120MHz
Cortex?-M4F up to 1MB Flash (144pin)
K61 Sub-Family K61P144M120SF3 K61 Sub-Family Supports the following: MK61FX512VMD12, MK61FN1M0VMD12 Key features ? Operating Characteristics – Voltage range: 1.71 to 3.6 V – Flash write voltage range