Field Name            Bits   Default Description
PRE_WRITE_TIMER       27:0   0x0     Pre-Write Timer. The number of clocks that a write to
                                     the CP_RB_WPTR register will be delayed until actually
                                     taking effect. Default = 0
PRE_WRITE_LIMIT       31:28  0x0     Pre-Write Limit. The number of times that the
                                     CP_RB_WPTR register can be written (while the
                                     PRE_WRITE_TIMER has not expired) before the
                                     CP_RB_WPTR register is forced to be updated with the
                                     most recently written value. Default = 0