Arietta technical documentation Buy
Add up to three USB 2.0 host ports
The signals of three USB 2.0 host ports are wired on J4 pads but some of them are already used so it is possible to use them only in specific situations. The signals of the USB port A are wired to the microUSB connector so it is possible to use them only when the microUSB port is not used or not plugged on a PC. The signals of the USB port B are wired to the WiFi port so it is possible to use them only when the WiFi adapter is not plugged on Arietta.
| Line | Signal | Speed | Notes |
|---|---|---|---|
| J4.4 | USB A D- | High | Don't use if the microUSB data lines are used |
| J4.6 | USB A D+ | High | Don't use if the microUSB data lines are used |
| J4.16 | USB B D+ | High | Don't use if the WiFi module is mounted |
| J4.18 | USB B D- | High | Don't use if the WiFi module is mounted |
| J4.20 | USB C D- | Full | |
| J4.22 | USB C D+ | Full |
