Olimex Open Source Hardware Embedded ARM Linux single board computer with Allwinner A10 Cortex-A8 A10-OLINUXINO-LIME A10-OLinuXino-LIME 用户手册

OLIMEX© 2014

A10-OLinuXino-LIME user's manual

The part of the schematic related to the USB_HOST connectors is listed below:

There are two USB host connector featured on the board. They are called USB_HOST1 and 
USB_HOST2. Each of them has own connector, both situated near the Ethernet connector. Each of 
connector has own low loss power distribution switch SY6280 which protects the board in case the 
devices you have plugged to the board try to draw more current than 523mA combined. The 
maximum current available on each of the USB hosts is exactly 523mA.

The SY6280 responsible for the USB_HOST1 is enabled by USB0-DRV1 (processor pin A4).

The SY6280 responsible for the USB_HOST2 is enabled by USB0-DRV2 (processor pin A5).

USB_HOST connectors

USB_HOST1 Signal name Processor pin

USB_HOST2

Signal name

Processor pin

Pin #1

5V

Connected to SY628 Pin #1

5V

Connected to SY628

Pin #2

UDM1

P20

Pin #2

UDM2

R20

Pin #3

UDP1

P21

Pin #3

UDP2

R21

Pin #4

GND

-

Pin #4

GND

-

The GND is common for both levels of the USB_HOST.

The LIME board is equipped with a standard RJ45 Ethernet connector at the top of the board that 
allows you to access local network via an Ethernet cable.

The LAN connectivity is handled by Realtek's RTL8201CP. Some of the features of this 
10/100Mbit controller are:

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