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Sipeed RV Debugger Plus.


Operating system used

  • Sipeed RV Debugger Plus

    Sipeed RV Debugger 1

    Sipeed RV Debugger 2

    Sipeed RV Debugger 3

    Sipeed RV Debugger 4

    IC markings were difficult to capture:

    Sipeed RV Debugger 5

  • Sipeed RV Debugger Plus components

    Sipeed RV Debugger Plus components

    Component Description
    1 USB Type-C
    2 Master BL702
    3 2.54 mm pitch pin header
    4 Boot button
    5 Debugging information , debugging serial port
    6 Indicator light
    7 Reserve 2.4G antenna pad

  • Interface description
    The RV debugger plus has a total of 13 pins of which the tail has 10 pins.

    JTAG and UART interface description
    Pin name Pin function description
    3V3 3.3V output
    GND Ground
    TX Virtual serial port (UART1) transmitting terminal, the default level is 3.3V
    RX Virtual serial port (UART2) receiving end, the default level is 3.3V
    DTR Virtual serial port (UART1) data terminal ready end, the default level is 3.3V
    RTS Virtual serial port (UART1) request sender, the default level is 3.3V
    5V 5.0V output
    GND Ground
    TCK JTAG Test Clock Input, the default level is 3.3V
    TDI JTAG Test Data Input, the default level is 3.3V
    TDO JTAG Test Data Output, the default level is 3.3V
    TMS JTAG Test Mode Selection, the default level is 3.3V
    *RX0 Debug information printing serial port (UARTO) sender, the default level is 3.3V
    *TX0 Debug information printing serial port (UARTO) sender, the default level is 3.3V
    BOOT BL702 download mode enable terminal, press enable (only need to press when you need to re-burn the firmware).

    * The default baud rate of UARTO is 2 MHz and techical support for this UART is not provided.

  • Hardware connection details.
    The RV Debugger Plus is connected to the computer using a USB Type C data cable.

    VCC (top pin) is 5V
    Sipeed RV Debugger Plus top pins

    VCC (bottom pin) is 3V3
    Sipeed RV Debugger Plus bottom pins

    Overview of hardware conditions
    External power supply voltage requirements 4.6 - 5.4 V (Recommend 5.0 V)
    External power supply current demand @ 5V >= 600 mA
    Kit full load current Debugger itself 20 mA
    Range of working temperature 0℃ - 75℃
    Temperature rise < 30 K

    BOOT button After pressing and then powering on, the debugger will enter the download mode, please do not use it lightly.
    UART interface The UART1 of the debugger uses push-pull output, so the TX pin may sink current to the target board and cause incomplete power-off.
    Power supply Please do not short-circuit the 5/3V3 and GND pins, otherwise the fuse may be permanently blown.
    Others Please do not hot-plug the periherals of the module with power, otherwise it may cause ElectroStatic Discharge (ESD) damage.

  • The JTAG of RV Debugger Plus can be used without installing a driver in Windows and Linux. Theoretically, this also applies to macOS. The official system has integrated FT2232 driver. The RV Debugger Plus simulates a standard FT2232HL. In theory, it is compatible with FT2232 simulation environment. It is recommended to use the OpenOCD tool chain. No driver is required to use the virtual serial port. If unknown hardware appears under Windows, please use a third-party tool to install the driver (such as the driver wizard).

    The maximum communication rate of the RV Debugger Plus JTAG is 2.5 Mhz, and the baud rate supported by the virtual serial port is up to 2MJTAG. Gowin FPGA is not supported temporarily.

    Firmware update can be downloaded from:

    About secondary development: The main chip BL702 of the RV Debugger Plus integrates the BLE function, so the debugger reserves the corresponding impedance matching circuit and 20x12mm ceramic patch antenna pads when leaving the factory. If you need secondary development, please refer to the official website link of Boliu Smart for the software SDK. For the hardware part, please go to the Sipeed download site to obtain the corresponding HDK.

    Pressing the BOOT button without releasing it and then connecting to the computer will make the RV Debugger Plus enter the download mode. With the official Bouffalo engineer BLDevCube, it can download the firmware to the debugger.
    See the tool usage guide: