...= 0, never let FIFO underflow or overflow. FIFO threshold...
aWhen REG41.EN_PACK_LEN = 0, never let FIFO underflow or overflow. FIFO threshold can be set by REG40.TH_FIFO_EMPTY and REG40.TH_FIFO_FULL. 当REG41.EN_PACK_LEN = 0,从未让FIFO暗流或溢出。 FIFO门限可以由REG40.TH_FIFO_EMPTY和