NanoPi-M3无法启动，串口输出以下内容，停在Launch to 0x42C00000，请问这是什么问题？
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Second Boot by Nexell Co. : Ver0.3.6 - Built on Jun 29 2016 15:19:53
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DDR3 POR Init Start 0
Lock value = 179
GATE CYC = 0x00000492
GATE CODE = 0x00000000
Read DQ = 0x08080808
Write DQ = 0x08080808
DDR3 Init Done!
CCI Init!
Wakeup CPU Wakeup Sub CPU 1234567
CPU Wakeup done! WFI is expected.
CPU0 is Master!
Loading from sdmmc...
Image Loading Done!
Launch to 0x42C00000
