ARE THE USB AND USB 2 (or MINI USB ) similar im conections inside?
I want to KNOW if the inide conections of the USB ) regular) AND USB MINI (or USB 2 ) are SIMILAR?
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I think first we have to clarify the terminology.
The one you think of as "regular" USB is technically called USB Type A. Type B is the square kind that typically plugs into a printer. Then there are the Mini and Micro connectors, which have similar pins to the Type A connector, and finally the newest is the Type C connector, which adds a bunch of new pins and can be plugged in either up or down.
Along with changes to the connectors are also changes to the electrical specifications. The first version of the USB electrical standard was 1.0, later superseded by version 1.1. In the initial version, data transfer speed was limited to 12 megabits per second (mbps). Now of course we want stuff to go faster all the time, so version 2.0 came out pushing the data speed up to 480 mbps. The nice thing about version 2.0 was that it could still use the existing connectors, types A, Mini and Micro. Type C hadn't been invented yet.
Naturally, they said let's make it faster still, so USB 3.0 came out, pumping the speed up to 5 gigabits per second (gbps). That got updated to 3.1 Gen1 pretty quickly, but support for the USB Mini and Micro connectors was dropped, as they couldn't handle electrical requirements, so now you just have USB A and some other weird variants that nobody's ever used for anything working on 3.1 Gen1. Now we go to 3.1 Gen2 and the speed doubles to 10 gbps and we finally get the Type C connector that at long last catches up to Apple's Lighting port.
Being greedy we said hey, let's go to 20 gbps and thus USB 3.2 was born. Unfortunately, the old USB A connector just isn't up to the job, so that gets dropped too, leaving only the USB Type C connector that works with USB 3.2.
Okay, now that you've had your history lesson and understand the terminology, what was the question again? My best guess would be that you're asking if the pin definitions between the USB A and USB Mini connectors are the same. If that's the case, my answer would be, they're close.
USB Type A connectors have four pins, +5V, Data-, Data+ and GND. Mini and Micro connectors add one extra pin called USB OTG ID to support On-the-GO (OTG) connection, so they have five pins.
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Confused? Yeah, I am to. USB has many different connectors and 3 versions, each with sub versions.
Your question would be better answered if you stated the reason you are asking.
The whole story is rather complicated.
Versions USB1, USB2, USB3 and sub versions define not only pin functions, but also transfer speeds.
Connectors: 2A, 2B, 3A, 3B, Mini A & B, Micro A & B, 3B Micro, & 3C == I am not mentioning V1 connectors since they have long ago been retired.
The A connector is the biggest with 4 connections for version 2 and 9 for version 3
Version 3A connectors have a blue insulator and are backward compatible with V2A. V2A is forward compatible with V3A. That is, you can plug a V3A cable into a V2A socket, or a V2A cable into a V3A socket. A V2A connector usually has a white insulator, except for the dual ended ones used to connect to a hard drive. They are black.
HOWEVER, there are separate circuits and drivers for the V2 and V3 sections. So, plugging a V2A into a V3A or vice versa does not guarantee it will function.
Now the details.
The A connector is mostly plugged into a computer. V2A connectors are paired with V2 Mini or V2 Micro connectors on the other end. The V2 Mini and V2 Micro connectors have 5 pins. That 5th pin is used for a couple of things. For example, Garmin uses it to indicate that its device is plugged into its cable and causes the device to boot to the operational mode. If the pin is not connected, the device boots to a USB storage device mode. Other uses would be to tell a phone to run in OTG mode. The pin may be connected via a resistor to ground or +5V. The value of the resistor may also be different for different devices.
Phones with proprietary fast charging schemes use the pin to signal that it can fast charge. However, the A side must be connected to an adapter capable of handling the higher current. Some devices will charge slowly without the pin connected, others like a Nitendo won't charge at all.
QC charging scheme rely on data communications to determine charging voltages.
The extra 5 pins on V3 A connectors are for additional data lines to support higher transfer protocols.
The V3 micro has 10 pins. The extra pin functions the same as the 5th pin on the V2 Mini & Micro.
A little more mystery: A V2 micro can be plugged into one side of a V3 micro socket and a V2 B can be plugged into the bottom of a V3B socket. There is also an A, a B, and an AB version of a V2 micro and V2 Mini connectors. The standard Mini is an A, the standard Micro is a B. The AB version is a socket that accepts either an A or B. However, the non-standard versions are rare except for my drone controller. And I have no idea why DJI decided using them was a good idea.
More info here. https://en.wikipedia.org/wiki/USB_hardwa...
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