HiFive1 Rev B
Freedom Everywhere
Based on the success of the SiFive HiFive1 and developer feedback, the SiFive HiFive1 Rev B is an Arduino-compatible development board featuring the SiFive Freedom E310-G002 (FE310-G002) SoC plus a ESP32-SOLO-1 Wi-Fi and Bluetooth module, making it the best way to prototype and develop RISC-V software for IoT and embedded applications.
HiFive1 Rev B Features and Specifications
Designed for IoT and edge computing, the FE310-G002 instantiates a SiFive Essential™ E3 Series CPU Core Complex, a high performance 32-bit RV32IMAC core. Additional features include a 16KB L1 Instruction Cache, a 16KB Data SRAM scratchpad, hardware multiply/divide, a debug module compatible with the RISC-V debug spec 0.13, flexible clock generation with on-chip oscillators and PLLs, and a wide variety of peripherals including UARTs, I2C QSPI, PWMs, and timers. Multiple power domains and a low-power standby mode ensure a wide variety of applications can benefit from the FE310. The USB debugger has been upgraded to SEGGER J-Link-OB, adding support for drag & drop flash programming as well as SEGGER JLink integration with SiFive Freedom Studio, an Eclipse based IDE. Freedom Studio is packaged with a prebuilt toolchain and example software projects. Alternatively, the SiFive Freedom Tools download package includes a pre-built toolchain, debugger, and additional command line tools that can be plugged into your own bespoke development environment.
Microcontroller
FE310-G002
Operating Voltage
3.3 V and 1.8 V
Input Voltage
5 V USB or 7-12 VDC Jack
IO Voltage
3.3 V
Digital I/O Pins
19
PWM Pins
9
SPI Controllers/HW CS Pins
1/3
UART
2
I2C
1
Networking
WiFi/BT (off-chip)
External Interrupt Pins
19
External Wakeup Pins
1
Flash Memory
32 Mbit Off-Chip (ISSI SPI Flash)
Host Interface (microUSB)
Program, Debug, and Serial Communication
Debug
Segger J-Link, drag/drop code download
Weight
22 g
Dimensions
68 mm
Long
51 mm
Wide
SoC
Freedom E310
FE310-G002
Using HiFive1 Rev B
Documentation & Support
Why buy the HiFive1?
If you’re a software developer, system architect, hacker, or maker, we can think of a few reasons to buy this board:
- Prototype Embedded/IoT application on RISC-V
- Built-in wireless connectivity (WiFi, BT)
- Drag and drop code download support
- Support open source hardware
- Create the next great thing!
For those following the RISC‑V space, SiFive’s new Freedom E310 is a long-awaited milestone.
SiFive is providing innovative solutions that will fundamentally change the semiconductor industry.
