Specifications

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4. Peripheral Interfaces & Connectors
4.1. Main USB Interface (P1)
The EM-X270 main USB interface complies with the USB OTG standard. The PXA270
USB controller is a USB Revision 1.1-compliant, full-speed device that operates half-
duplex at a baud rate of 12 Mbps. Refer to chapter 12 of the PXA270 Reference Guide for
a more detailed description of the USB controller.
When operating in USB host mode, the EM-X270 power supply system provides
5V/100mA DC (in compliance with USB OTG standard) on the VCC pin of connector P1.
When operating in USB slave mode, voltage output is disabled, and the VCC pin of
connector P1 is used as an input voltage pin of an external battery charger. Refer to section
3.10 for more details about the USB power system.
Connector P1, mini USB type AB:
Pin Signal Name
1 USV_VCC
2 USB_N
3 USB_P
4 USB_ID
5 GND
Reference connector data:
Manufacturer Mfg. P/N Mating connector
Astron 22-2601-5G-1T-R Standard USB mini-B plug.
Standard USB mini-A plug.