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McBSP+DMA transaction error!

Other Parts Discussed in Thread: DM3730

DM3730,McBSP工作正常,DMA使用Hardware-Synchronized Transfer方式传输,可以进入中断,进中断之后检测CSR寄存器,只有第八比特位置1,即TRANS_ERR Transaction error event,请问如何确认传输错误的原因?另外,手册上有这样一句话:

Channel 5 is dedicated to peripheral→memory transfer, hardware triggered, and synchronized on the
read side.

是不是说在McBSP的接收端只能使用DMA通道5呢?

不甚感激!!