Microcontroller：SiFive Freedom E310（FE310）CPU：SiFive E31 CPUArchitecture：32-bit RV32IMACSpeed：320+ MHzPerformance：1.61 DMIPs/MHzMemory：16 KB Instruction Cache, 16 KB Data ScratchpadOther Features：Hardware Multiply/Divide, Debug Module, Flexible Clock Generation with on-chip oscillators and PLLsOperating Voltage：3.3 V and 1.8 VInput Voltage：5 V USB or 7-12 VDC JackIO Voltages：Both 3.3 V or 5 V supportedDigital I/O Pins：19PWM Pins：9SPI Controllers/HW CS Pins：1/3External Interrupt Pins：19External Wakeup Pins：1Flash Memory：128 Mbit Off-Chip（ISSI SPI Flash）Host Interface（microUSB）：Program, Debug, and Serial CommunicationDimensions：68 mm x 51 mmWeight：22 g
