PLA_RX_FIFO_EMPTY
ocp_write_word(tp, MCU_TYPE_PLA, PLA_RX_FIFO_EMPTY, pause_off / 16);
ocp_write_word(tp, MCU_TYPE_PLA, PLA_RX_FIFO_EMPTY, 0);
ocp_write_word(tp, MCU_TYPE_PLA, PLA_RX_FIFO_EMPTY, 4096 / 16);