User Manual Q&AAnswer
Dec 03, 2025 - 09:39 AM
To write the bootloader to the RZ/G2L, RZ/G2LC, or RZ/V2L reference boards, follow these steps using the Flash Writer tool provided by Renesas:
1. **Booting Flash Writer:**
- Turn on the power of the board and connect it to a control PC via USB serial cable.
- Open a terminal software and set the serial communication protocol settings as follows:
- Speed: 115200 bps
- Data: 8bit
- Parity: None
- Stop bit: 1bit
- Flow control: None
- Set the board to SCIF Download mode by adjusting SW11 settings.
- Press the reset button SW10 to initiate the Flash Writer process.
2. **Writing Bootloader:**
- Use the "XLS2" command of Flash Writer to write binary files to the specified addresses in the Flash ROM.
- Send the data of the bootloader file from the terminal software after the prompt "please send !" is displayed.
- Follow the instructions on the terminal software to complete the writing process.
3. **Setting U-boot:**
- Set the board to SPI Boot mode by adjusting SW11 settings accordingly.
- Eliminate warning messages by setting correct environment variables and saving them to the Flash ROM.
- If booting from a micro SD card on the SMARC carrier board, set environment variables using specific commands provided in the manual.
- Save the environment settings to the Flash ROM.
By following these steps, you can successfully write the bootloader to the RZ/G2L, RZ/G2LC, or RZ/V2L reference boards using the Flash Writer tool provided by Renesas.
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