BOOT下载失败

各位大神，我自己用RK3399RPO的芯片做了几块样板，原理图完全参考官方的，下载程序时,提示BOOT下载不成功，DDR工具检查也是正常的，以下是下载失败时打印的log信息，求各位大神指导一下！

In
Channel 0: LPDDR3, 800MHz
CS = 0
MR0=0x58
MR1=0x58
MR2=0x58
MR3=0x58
MR4=0x12
MR5=0x19
MR6=0x6
MR7=0x3B
MR8=0x1F
MR9=0x1F
MR10=0x1F
MR11=0x1F
MR12=0x1F
MR13=0x1F
MR14=0x1F
MR15=0x1F
MR16=0x1F
CS = 1
MR0=0x58
MR1=0x58
MR2=0x58
MR3=0x58
MR4=0x12
MR5=0x11
MR6=0x6
MR7=0xBB
MR8=0x1F
MR9=0x1F
MR10=0x1F
MR11=0x1F
MR12=0x1F
MR13=0x1F
MR14=0x1F
MR15=0x1F
MR16=0x1F
W FF != R
Cap error!
Channel 1: LPDDR3, 800MHz
CS = 0
MR0=0x58
MR1=0x58
MR2=0x58
MR3=0x58
MR4=0x2
MR5=0x1
MR6=0x6
MR7=0x0
MR8=0x1F
MR9=0x1F
MR10=0x1F
MR11=0x1F
MR12=0x1F
MR13=0x1F
MR14=0x1F
MR15=0x1F
MR16=0x1F
CS = 1
MR0=0x58
MR1=0x58
MR2=0x58
MR3=0x58
MR4=0x2
MR5=0x1
MR6=0x6
MR7=0x0
MR8=0x1F
MR9=0x1F
MR10=0x1F
MR11=0x1F
MR12=0x1F
MR13=0x1F
MR14=0x1F
MR15=0x1F
MR16=0x1F
Bus Width=32 Col=10 Bank=8 Row=15/15 CS=2 Die Bus-Width=32 Size=2048MB
no stride
read addr 0x20000000 = 0xF
ERR