LeMaker Guitar:USB3.0

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USB 3.0 Description

On LeMaker Guitar base board Rev.B, there is a USB 3.0 Micro-B Receptacle, which can work as USB device mode and host mode.
Guitar USB3.0.jpg

Device Mode

When you want to flash the OS image firmware into the LeMaker Guitar EMMC nand flash, you need connect the Guitar to PC. Or when you want to debug the Android APP on Guitar, you also need connect the Guitar to the PC. At that time, the LeMaker Guitar is acting as a device of PC, so the USB 3.0 will work as device mode. But currently the USB3.0 device mode low level driver has not finished development, so when you use it as device mode, it will switch to USB2.0 device function automatically.
You can use a "USB 2.0 Micro-B Plug to USB 2.0 Standard-A Plug" cable like this to connect LeMaker Guitar to PC:

USB2.0 cable.jpg Guitar USB2.0 connect.jpg
USB2.0 Micro-B Plug to USB2.0 Standard-A Plug Cable Guitar USB2.0 device mode


You can also use a "USB 3.0 Micro-B Plug to USB 3.0 Standard-A Plug" cable like this to connect LeMaker Guitar to PC (also will act as USB2.0 device function):

USB3.0 cable.jpg Guitar USB3.0 as device.jpg
USB3.0 Micro-B Plug to USB3.0 Standard-A Plug Guitar USB3.0 device mode


Host Mode

The host mode may be more useful than device mode, because most of you will use the USB3.0 to connect the hard disk or 1000Mbps ethernet adapter. When you want to use the USB 3.0 Micro-B Receptacle as the host mode, you need a USB 3.0 Micro-B OTG cable (USB 3.0 Micro-B Plug to USB 3.0 Standard-A Receptacle ) like below:

USB3.0 OTG.jpg
USB3.0 Micro-B Plug to USB3.0 Standard-A Receptacle


USB3.0 Micro-B Pin Definition

Because there are two different USB 3.0 Micro-B OTG cable with different pin definition, you need be careful to buy a right one from the market. You can refer to the diagram below to select the right OTG cable.

USB3.0 Micro B Plug to USB3.0 Standard A Receptacle.png

USB3.0 Micro-B plug.jpg USB3.0 Standard-A Receptacle.png
USB3.0 Micro B Plug.jpg USB3.0 Standard A Receptacle.jpg
USB3.0 Micro-B Plug USB3.0 Standard-A Receptacle


Connector USB 3.0 Hard Disk

To connect the USB 3.0 hard disk, you need a USB 3.0 Micro-B OTG cable, a USB 3.0 hard disk connection cable and a USB3.0 hard disk.
Guita to be host.jpg Guitar USB3.0 as host .jpg

Where to buy the USB3.0 OTG cable

You can buy the USB3.0 OTG cable for LeMaker Guitar from: http://www.lenovator.com/product/95.html