usb_public：1.修改为低功耗版本时序，增加rx转tx延时，默认2M；
Review Request #5404 — Created Dec. 3, 2022 and updated
| Information | |
|---|---|
| chenjianrong | |
| YC1306 | |
| Reviewers | |
| chenjianrong, luoyuxi | |
1.修改为低功耗版本时序，增加rx转tx延时，默认2M；
Review Request #5404 — Created Dec. 3, 2022 and updated
| Information | |
|---|---|
| chenjianrong | |
| YC1306 | |
| Reviewers | |
| chenjianrong, luoyuxi | |
1.修改为低功耗版本时序，增加rx转tx延时，默认2M；
