| IN_RST | The bit is used to reset in dma fsm and in data fifo pointer. |
| OUT_RST | The bit is used to reset out dma fsm and out data fifo pointer. |
| AHBM_FIFO_RST | reset spi dma ahb master fifo pointer. |
| AHBM_RST | reset spi dma ahb master. |
| IN_LOOP_TEST | Set bit to test in link. |
| OUT_LOOP_TEST | Set bit to test out link. |
| OUT_AUTO_WRBACK | when the link is empty jump to next automatically. |
| OUT_EOF_MODE | out eof flag generation mode . 1: when dma pop all data from fifo 0:when ahb push all data to fifo. |
| OUTDSCR_BURST_EN | read descriptor use burst mode when read data for memory. |
| INDSCR_BURST_EN | read descriptor use burst mode when write data to memory. |
| OUT_DATA_BURST_EN | spi dma read data from memory in burst mode. |
| DMA_RX_STOP | spi dma read data stop when in continue tx/rx mode. |
| DMA_TX_STOP | spi dma write data stop when in continue tx/rx mode. |
| DMA_CONTINUE | spi dma continue tx/rx data. |