SparkFun RED-V RedBoard - SiFive RISC-V FE310 SoC

The SparkFun RED-V RedBoard is a low-cost, open-source development board featuring the Freedom E310 SoC that uses the RISC-V instruction set architecture (ISA). This unique product allows anyone to fully utilise the microcontroller without the need for royalties, licenses, or non-disclosure agreements.

The SparkFun RED-V RedBoard stands out with its familiar Arduino Uno R3 form factor, 32MB of QSPI flash, an NXP K22 ARM Cortex-M4 for USB connectivity and JTAG interface, and a Qwiic connector for easy I²C offerings. It features a modern USB-C connector for easy programming and has exposed the JTAG connector for advanced users. The board comes programmed with a simple bootloader, making it an excellent choice for prototyping and developing RISC‑V applications.

The Freedom E310 (FE310) on board is the first member of the Freedom Everywhere family of customizable SoCs from SiFive. Designed for microcontroller, embedded, IoT, and wearable applications, the FE310 features SiFive’s E31 CPU Coreplex, a high-performance, 32-bit RV32IMAC core. Running at 150MHz, the FE310 is among the fastest microcontrollers in the market. It includes a 16KB L1 Instruction Cache, a 16KB Data SRAM scratchpad, hardware multiply/divide, a debug module, flexible clock generation with on-chip oscillators and PLLs, and a wide variety of peripherals. The RED-V requires Freedom Studio software or a Zephyr RTOS build environment to program the board and interface with it.

Note: Qwiic Libraries for the Freedom Studio SDK or the Zephyr environment that runs on the FE310 are not yet available. Updates will be provided when these become available.

Features:

• Arduino R3 Footprint
• Microcontroller: SiFive Freedom E310 (FE310-G002)
  • CPU: SiFive E31 CPU
  • Architecture: 32-bit RV32IMAC
  • Speed: 256 MHz (default), 320MHz (Max)
  • Performance: 1.61 DMIPs/MHz
  • Memory: 16 KB Instruction Cache, 16 KB Data Scratchpad
  • Other Features: Hardware Multiply/Divide, Debug Module, Flexible Clock Generation with on-chip oscillators and PLLs
• Operating Voltage: 3.3 V and 1.8 V
• Input Voltage: 5 V USB or 7-15 VDC Jack
• IO Voltages: Both 3.3 V or 5 V supported
• Digital I/O Pins: 19
• PWM Pins: 9
• SPI Controllers/HW CS Pins: 1/3
• External Interrupt Pins: 19
• External Wakeup Pins: 1 (& button)
• Host Interface (USB-C): Program, Debug, and Serial Communication
• Qwiic Connector

Documents:

• Schematic
• Eagle Files
• Dimensions
• Hookup Guide
• Freedom E310-G002 Datasheet
• Freedom E310-G002 Manual
• Freedom E SDK
• SiFive Forums
• GitHub Hardware Repo
• Compare SparkFun RedBoards