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HiFive1 Rev B

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Since the launch of the original HiFive1 and the FE310 in 2016, we have received lots of great community feedback. The FE310-G002 is an upgrade to the Freedom Everywhere SoC, that adds support for the latest RISC-V Debug Spec 0.13, hardware I²C, two UARTs, and power gating the core rail in low power sleep modes. Like the original FE310, the FE310-G002 features SiFive’s E31 CPU core complex, a high-performance, 32-bit RV32IMAC core with a 16 KB L1 instruction cache, a 16 KB data SRAM scratchpad, and hardware multiply/divide. Running at 320+ MHz, the FE310 is among the fastest microcontrollers on the market.

The HiFive1 dev board has also been upgraded. Powered by the FE310-G002, the new HiFive1 Rev B has wireless connectivity through an onboard Wi-Fi/Bluetooth module. The USB debugger has been upgraded to Segger J-Link, with support for drag & drop code download. In favor of driving GPIO directly from the FE310, the HiFive1 Rev B supports 3.3 V I/O only.

  • CPU: SiFive E31
  • RISC-V Debug Spec: version 0.13
  • Low-power Sleep Mode: Yes
  • Always-on Domain: 3.3V
  • Hardware I2C: 1
  • UART: 2
  • QSPI/SPI: 1/1 with 3 chip selects
  • PWM: 9
  • GPIO: 19
  • RF Frequency: 320 MHz
  • Data Bus Width: 32 bit
  • Processor: SiFive FE310-G002
  • USB Debug: Segger J-Link
  • Wireless Network: Wi-Fi & Bluetooth


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