J3 DDR Bring up出错

1.自己设计的硬件板

2.当前系统镜像版本：X3J3-PlatformSDK-PL2.1-V1.2.0-20211210

3.上位机版本hbupdatev1.4

4.问题定位：ddr烧写出问题

编译命令：./build.sh -m micron -f 3200 -i2 -s secure -b j3dvb_emmc

log如下：

[2023-02-06 09:56:55,634] [Update0] [DEBUG] uart_boot.py:141 data/xj3-ddr/MICRON-DDR4-3200-aaaa-ddr.bin start 6.100416 end 7.643670

[2023-02-06 09:56:55,634] [Update0] [INFO] uart_boot.py:142 start load data/xj3-ddr/MICRON-DDR4-3200-aaaa-ddr.bin

[2023-02-06 09:56:55,635] [Update0] [INFO] uart_boot.py:150 start ymodem transfer.

[2023-02-06 09:57:01,524] [Update0] [INFO] uart_boot.py:160 load success

[2023-02-06 09:57:01,525] [Update0] [INFO] uart_boot.py:120 wait download...

[2023-02-06 09:57:03,539] [Update0] [DEBUG] uart_boot.py:141 data/board_config/xj3-key1/boot_config/boot_file/boot_uart_secure.pkg start 7.643670 end 30.000000

[2023-02-06 09:57:03,539] [Update0] [INFO] uart_boot.py:142 start load data/board_config/xj3-key1/boot_config/boot_file/boot_uart_secure.pkg

[2023-02-06 09:57:03,539] [Update0] [INFO] uart_boot.py:150 start ymodem transfer.

请问该问题怎么排查