NXP 恩智浦Kinetis K20: 120MHz
Cortex-M4F up to 1MB Flash (144pin)
K20 Sub-Family K20P144M120SF3 K20 Sub-Family Supports the following: MK20FX512VLQ12, MK20FN1M0VLQ12, MK20FX512VMD12, MK20FN1M0VMD12 Key features ? Operating Characteristics – Voltage range: 1.71