Mechanics of USB cable and connector

The existing and only four types of USB plug (so-called public header) are provided ).

For the standard series, 1-4 are defined as follows:

Bytes -----------------------------------------------------------------------------------------------------------------------
Contact number contact number signal name typical wiring assignment
Bytes -----------------------------------------------------------------------------------------------------------------------
1 vbus red
Bytes -----------------------------------------------------------------------------------------------------------------------

2
D-white
Bytes -----------------------------------------------------------------------------------------------------------------------
3 D + green
Bytes -----------------------------------------------------------------------------------------------------------------------

4
Gnd black
Bytes -----------------------------------------------------------------------------------------------------------------------
Shell shell shield drain wire disturbing line
Bytes -----------------------------------------------------------------------------------------------------------------------

For the mini series, 1-5 are defined as follows:

Bytes -----------------------------------------------------------------------------------------------------------------------
Contact number signal name typical wiring assignment
Bytes -----------------------------------------------------------------------------------------------------------------------
1 vbus red
Bytes -----------------------------------------------------------------------------------------------------------------------
2 D-white
Bytes -----------------------------------------------------------------------------------------------------------------------
3 D + green
Bytes -----------------------------------------------------------------------------------------------------------------------
4 id a: To Gnd | B: Float
Bytes -----------------------------------------------------------------------------------------------------------------------
5 Gnd black
Bytes -----------------------------------------------------------------------------------------------------------------------
Shell shield drain Wire
Bytes -----------------------------------------------------------------------------------------------------------------------

Standard A is the most common type. Most USB mouse and keyboard connectors are of this type. You can directly Insert the standard a connector tacle (master) on the PC ). The biggest benefit of standard A is that it can be directly connected to a PC without additional USB cables.

Standard B is commonly used on "large" USB devices, such as printers and scanners.

The biggest difference between the mini series and standard series is that the standard series has only four wires, while the mini series has five wires, with one more id line for the OTG function. Mini Series blocks are relatively small and mostly seen in small USB handheld devices, such as MP3, PDA, and mobile phones.

Mini-
A. The plastic part of the connector is elliptical, and the USB logo in the middle is also surrounded by an elliptical shape. The most important thing is that the ID line must be grounded. If resistance is needed, the impedance must be less than 10 euro. While
The mini-B is the ID line suspended or grounded by the resistance of> 100 thousand euro. In addition, the plastic part of mini-B should be a rectangle, USB
The logo is also enclosed in a rectangle. In fact, the cost of USB cable is increased if resistance is used, so it is usually directly grounded or suspended.