Register
| MEAS_NUM_LIMIT | need_des |
| MAX_MEAS_NUM | max conversion number |
| SAR1_INV | 1: data to DIG ADC1 CTRL is inverted, otherwise not |
| SAR2_INV | 1: data to DIG ADC2 CTRL is inverted, otherwise not |
| TIMER_SEL | 1: select saradc timer 0: i2s_ws trigger |
| TIMER_TARGET | to set saradc timer target |
| TIMER_EN | to enable saradc timer trigger |