| DUTY_SCALE | This register controls the increase or decrease step scale for low speed channel0. |
| DUTY_CYCLE | This register is used to increase or decrease the duty every reg_duty_cycle_lsch0 cycles for low speed channel0. |
| DUTY_NUM | This register is used to control the num of increased or decreased times for low speed channel6. |
| DUTY_INC | This register is used to increase the duty of output signal or decrease the duty of output signal for low speed channel6. |
| DUTY_START | When reg_duty_num_hsch1 reg_duty_cycle_hsch1 and reg_duty_scale_hsch1 has been configured. these register won’t take effect until set reg_duty_start_hsch1. this bit is automatically cleared by hardware. |