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OTG adds a fifth pin to the standard USB connector, called the ID-pin; the micro-A plug has the ID pin grounded, while the ID in the micro-B plug is floating. A device with a micro-A plug inserted becomes an OTG A-device, and a device with a micro-B plug inserted becomes a B-device. The type of plug inserted is detected by the state of the pin ID.
The OTG device with the A-plug inserted is called the A-device and is responsible for powering the USB interface when required, and by default assumes the role of host. The OTG device with the B-plug inserted is called the B-device and by default assumes the role of peripheral. An OTG device with no plug inserted defaults to acting as a B-device.
Edited to correct the fill colors: white areas represent cavities in the plugs; grey areas represent volumes filled with insulating material. Als corrected the orientation of the micro plugs: on the micro-B plugs the top side (which is the side on which the USB logo is (supposed to be) stamped) has the terminals and the chamfers on the housing.
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Use: The first transaction in each (micro)frame. An SOF allows endpoints to identify the start of the (micro)frame and synchronize internal endpoint clocks to the host. Frame number: This is a frame number that is incremented by the host periodically to allow endpoints to identify the start of the frame (or microframe) and synchronize internal ...
IOIO-OTG pinout/connection diagram. The second-generation IOIO boards (known as IOIO-OTG) contain the following on-board features: [37] [38] [39] As the name suggests, a key feature of this generation is the introduction of USB-OTG, supporting USB master or slave mode. This enables the IOIO to connect to older Android phones that only support ...
The Samsung Galaxy S III, and later Galaxy Note II and Galaxy S4, use an 11-pin connector and the six additional connector pins in order to achieve functional improvements over the 5-pin design (like simultaneous USB-OTG use [25]). However, if consumers have a standard MHL-to-HDMI adapter all they need to purchase is a tip.
Micro-USB; due to Micro-USB power delivery limitations, powering over GPIO is suggested [4] [5] 5V/2.5~3A Micro USB (supports low power voltage detection) 12V - 19V DC-in barrel connector 12-19V via DC barrel power input jack (5.5/2.5 mm) 12-19V via DC barrel power input jack (5.5/2.5 mm) 1 x 4-Pin Power In Header (also for POE module) Form Factor