NXP 恩智浦Kinetis? K40: 100MHz
Cortex-M4 512KB Flash (121 pin)
Kinetis K40: 100MHz Cortex-M4 512KB Flash (121 pin) K40P121M100SF2V2 K40 Sub-Family Supports the following: MK40DN512VMC10 Features ? Operating Characteristics – Voltage range: 1.71 to 3.6 V – Flash