RMT apb configuration register
| APB_FIFO_MASK | 1’h1: access memory directly. 1’h0: access memory by FIFO. |
| MEM_CLK_FORCE_ON | Set this bit to enable the clock for RMT memory. |
| MEM_FORCE_PD | Set this bit to power down RMT memory. |
| MEM_FORCE_PU | 1: Disable RMT memory light sleep power down function. 0: Power down RMT memory when RMT is in light sleep mode. |
| SCLK_DIV_NUM | the integral part of the fractional divisor |
| SCLK_DIV_A | the numerator of the fractional part of the fractional divisor |
| SCLK_DIV_B | the denominator of the fractional part of the fractional divisor |
| SCLK_SEL | choose the clock source of rmt_sclk. 1:CLK_80Mhz,2:CLK_FOSC, 3:XTAL |
| SCLK_ACTIVE | rmt_sclk switch |
| CLK_EN | RMT register clock gate enable signal. 1: Power up the drive clock of registers. 0: Power down the drive clock of registers |