SB-SOM: Connectors: P3

Description

SB-SOM top view

SB-SOM bottom view

Connector P3 is a standard micro-USB3.0 type-AB connector. Connector P3 is available with all SB-SOM board configurations/revisions. The interface accessible through connector P3 is derived from system-on-module pins 174, 176, 178, 182, 184, 188 and 189. In most cases system-on-module implements a USB (host/gadget) interface at these pins.

Most common usage of this connector is outlined in the sub-chapters below.

Please refer to SB-SOM carrier board schematics and system-on-module hardware reference manual for pin functions, connector pinout and other details on your specific system.

USB OTG/Dual-Role operation

If P3 enables access to system-on-module implemented OTG/Dual-Role USB port (this is the most common case) the following two modes of operation are possible (operation mode is in most cases selected by software):

1. Gadget Mode: SB-SOM enables system-on-module operation in USB gadget mode (if supported by system-on-module) when connected to a standard USB2.0 / USB3.0 port on a host system (such as a standard PC) using a standard USB2.0/3.0 to micro-USB2.0/3.0 cable.
2. Host Mode: SB-SOM enables system-on-module operation in USB host mode allowing connection of USB gadgets (such as a disk-on-key, USB Keyboard, etc..) to the P3 connector through an appropriate adapter.

CompuLab adapters compatible with P3 for host operation
USB standard	CompuLab P/N
USB3.0	199D10490
USB2.0	199D10290

USB battery charging

Connector P3 can be used for main battery (at connector P19) charging instead of charging from a DC power source at the main power supply connector. This functionality relies on system-on-module hardware support for USB charger detection and SW support to enable/manage/monitor the charging process.

Connector Data

P3 connector Manufacturer MFG P/N GCT USB3125-30-A

P3 mating plugs Standard micro-USB2.0 type-B plug Standard micro-USB2.0 type-A plug Standard micro-USB3.0 type-B plug Standard micro-USB3.0 type-A plug