/* CFG_READBACK_CNT */
-------------------------------------- 
FIFO_WRITE_CNT_O        0  /* FIFO writing time, in clock ticks. */                   
FIFO_WRITE_CNT_W        16                                                            
DELAY_FIFO_WRITE_O      16  /* Delay in ticks before the FIFO begins trapping data, */
DELAY_FIFO_WRITE_W      16  /* when the cfg readback bit is set in RRIF CMD 1 */