ETC_TRIG7 Control Register
| SW_TRIG | Software write 1 as the TRIGGER. This register is self-clearing. |
| TRIG_MODE | TRIG mode register. 1’b0: hardware trigger. 1’b1: software trigger. |
| TRIG_CHAIN | TRIG chain length to the ADC. 0: Trig length is 1; … 7: Trig length is 8; |
| TRIG_PRIORITY | External trigger priority, 7 is highest, 0 is lowest . |
| SYNC_MODE | TRIG mode control . 1’b0: Disable sync mode; 1’b1: Enable sync mode |