RMT_SCLK configuration register
| SCLK_DIV_A | The denominator of the frequency divider factor of the rmt function clock. |
| SCLK_DIV_B | The numerator of the frequency divider factor of the rmt function clock. |
| SCLK_DIV_NUM | The integral part of the frequency divider factor of the rmt function clock. |
| SCLK_SEL | set this field to select clock-source. 0: do not select anyone clock, 1(default): 80MHz, 2: FOSC, 3: XTAL. |
| SCLK_EN | Set 1 to enable rmt function clock |