SPI1 DDR control register
| SPI_FMEM_DDR_EN | 1: in ddr mode, 0 in sdr mode |
| SPI_FMEM_VAR_DUMMY | Set the bit to enable variable dummy cycle in spi ddr mode. |
| SPI_FMEM_DDR_RDAT_SWP | Set the bit to reorder rx data of the word in spi ddr mode. |
| SPI_FMEM_DDR_WDAT_SWP | Set the bit to reorder tx data of the word in spi ddr mode. |
| SPI_FMEM_DDR_CMD_DIS | the bit is used to disable dual edge in command phase when ddr mode. |
| SPI_FMEM_OUTMINBYTELEN | It is the minimum output data length in the panda device. |
| SPI_FMEM_USR_DDR_DQS_THD | The delay number of data strobe which from memory based on SPI clock. |
| SPI_FMEM_DDR_DQS_LOOP | 1: Do not need the input of SPI_DQS signal, SPI0 starts to receive data when spi0_slv_st is in SPI_MEM_DIN state. It is used when there is no SPI_DQS signal or SPI_DQS signal is not stable. 0: SPI0 starts to store data at the positive and negative edge of SPI_DQS. |
| SPI_FMEM_CLK_DIFF_EN | Set this bit to enable the differential SPI_CLK#. |
| SPI_FMEM_DQS_CA_IN | Set this bit to enable the input of SPI_DQS signal in SPI phases of CMD and ADDR. |
| SPI_FMEM_HYPERBUS_DUMMY_2X | Set this bit to enable the vary dummy function in SPI HyperBus mode, when SPI0 accesses flash or SPI1 accesses flash or sram. |
| SPI_FMEM_CLK_DIFF_INV | Set this bit to invert SPI_DIFF when accesses to flash. . |
| SPI_FMEM_OCTA_RAM_ADDR | Set this bit to enable octa_ram address out when accesses to flash, which means ADDR_OUT[31:0] = {spi_usr_addr_value[25:4], 6’d0, spi_usr_addr_value[3:1], 1’b0}. |
| SPI_FMEM_HYPERBUS_CA | Set this bit to enable HyperRAM address out when accesses to flash, which means ADDR_OUT[31:0] = {spi_usr_addr_value[19:4], 13’d0, spi_usr_addr_value[3:1]}. |