I2S power-down configuration register
| FIFO_FORCE_PD | Force FIFO power-down. |
| FIFO_FORCE_PU | Force FIFO power-up. |
| PLC_MEM_FORCE_PD | Force I2S memory power-down. |
| PLC_MEM_FORCE_PU | Force I2S memory power-up. |
| DMA_RAM_FORCE_PD | Force DMA FIFO power-down. |
| DMA_RAM_FORCE_PU | Force DMA FIFO power-up. |
| DMA_RAM_CLK_FO | Set this bit to force on DMA RAM clock. |