usb_16M：1.降低对码功率，控制3米内；
Review Request #3717 — Created March 8, 2022 and updated
| Information | |
|---|---|
| chenjianrong | |
| YC1308 | |
| Reviewers | |
| huxin, jiangheng | |
1.降低对码功率，控制3米内；
Review Request #3717 — Created March 8, 2022 and updated
| Information | |
|---|---|
| chenjianrong | |
| YC1308 | |
| Reviewers | |
| huxin, jiangheng | |
1.降低对码功率，控制3米内；
