Description: Voltage-Power Supply: 1.71 V ~ 3.6 V Storage Type: FLASH I / O Number: 52 Storage Capacity: 256 KB Speed: 80MHz RAM Capacity: 64K x 8 Core Size: 32-Bit Data Converter: A / D 16x12b, D / A 2x12b Core Processor: ARM ® Cortex® -M4