UNICA SBC/Interfaces and Connectors/USB
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USB[edit | edit source]
Description[edit | edit source]
UNICA SBC provides two USB ports, one HOST and one OTG:
- J19 is a standard USB HOST 2.0 Type A connector
- J21 is a micro-AB - Hirose ZX62D-AB-5P8(30) - type receptacle for a USB OTG connection: this interface can operate in Host mode and Device (peripheral) mode
Signals[edit | edit source]
The following table describes the interface signals:
USB HOST[edit | edit source]
| Pin# | Pin name | Pin function | Pin Notes |
|---|---|---|---|
| 1 | USB_VBUS | VBUS | 5V USB power supply |
| 2 | D- | USB Host Data - | |
| 3 | D+ | USB Host Data + | |
| 4 | DGND | Ground | |
| 5, 6, 7, 8 | PCB_GND_RNG | Shield |
USB OTG[edit | edit source]
| Pin# | Pin name | Pin function | Pin Notes |
|---|---|---|---|
| 1 | USB_OTG_VBUS | VBUS | |
| 2 | D- | USB OTG Data - | |
| 3 | D+ | USB OTG Data + | |
| 4 | ID | USB OTG ID | |
| 5 | GND | Ground | |
| 6, 7, 8,9 | PCB_GND_RNG | Shield |
Device mapping[edit | edit source]
The USB Host port can be used under Linux for connecting USB peripheral devices: the related peripheral driver has to be integrated into the Linux kernel.
The USB OTG feature can be easily tested using the Mass Storage Gadget driver (or any other USB gadget driver).
