When using the optional output registers at port [A|B], assertion of the RST_[A|B]) pin resets the output registers. RST_MODE_[A|B] can be set to SYNC or ASYNC to determine whether RST_[A|B] is a synchronous or asynchronous. The RST_[A|B] has priority over OREG_CE_[A|B] and OREG_ECC_CE_[A|B].