Standard USB, mini-USB Interface Definition

Mini USB Interface Definition 5-pin USB Interface Definition

From: http://www.elecfans.com/article/88/196/2008/200804278877.html

 

The mini USB interface is defined as follows:
1: VCC
2: D-
3: D +
4: ID
5: Gnd
The ID foot is used only in the OTG function. Because the mini USB interface is divided into mini-a, B and AB interfaces.
If your system only uses slave, you can use the B interface. In the interface, the ID foot is suspended.
If it is the B interface, you need to use the ID script at this time,
The System Controller will determine the level of the ID foot to determine what kind of equipment is inserted. If it is a high level, it will be a B connector inserted. At this time, the system will be in the master mode)
If the ID is low, the interface is inserted, and then the system uses the HNP dialogue protocol to determine which is the master and which is the slave.
These descriptions are summarized by the technical staff and are for reference only.

Shape chart of mini usb a/B Interface

 

 

 

 

From: http://bbs.mydigit.cn/read.php? Tid = 74176

 

Standard USB, mini-USB interface definition (absolutely classic, worthy of favorites)

I can see that there are a lot of articles about USB and mini-USB interfaces on the network, and there are a lot of textures in it that are either unclear (not photos, but hand-painted ), either it is wrong (according to its standard plug can not be inserted into the socket), considering the widespread use of USB connections and interfaces, We have to re-edit it and hope to help you.

The following describes the definition of a standard USB interface.
USB is a commonly used PC interface with only four wires and two power supplies. Please note that do not reverse the positive and negative ends, otherwise, the USB device or the PC's nanqiao chip will be burned!






The ID foot is used only in the OTG function. The mini-USB interface consists of mini-A, B, and AB interfaces.
If your system only uses slave, you can use the B interface.
The System Controller will determine the level of the ID foot to determine what kind of equipment is inserted. If it is a high level, it will be a B connector inserted. At this time, the system will be in the master mode)
If the ID is low, the interface is inserted, and then the system uses the HNP dialogue protocol to determine which is the master and which is the slave.
These descriptions are summarized by the technical staff and are for reference only.

Generally, we use B-type mini-USB ports on our mobile phones.

Paste a common USB interface picture below

 
From left to right: miniusb public port (a plug), miniusb public port (B plug), USB public port (B), USB mother port (a socket) USB public port (type A plug)