What are the contacts on yusb. Functions of the "legs" of the Micro-USB connector. USB Basic Information

Submitted:

Victor Pankov sent an interesting reference to an article in which the features of the screening of USB connectors for correct charging of various gadgets are described in detail for correct charging of various gadgets, because it is no secret that often gadgets refuse to charge from a simple USB port of the drive or computer, or behave not as much as I would like.

Most of the modern gadgets (mobile phones, smartphones, players, electric junction, tablets, etc.) supports charging via USB Mini / Micro socket. There may be several connection options:

The device can be charged from PC via a standard data cable. This is usually a USB_AM-USB_BM_MINI / Micro cord. If the device is charged for the device more than 0.5 A (this is the maximum that is capable of USB 2.0), the charge time may turn out to be extremely long, up to infinity. The USB 3.0 port (this) is already given 0.9 A, but this may not seem to someone.

Through the same data cable, your device can be charged from the native charger (network or automotive), equipped with a 4-pin USB-AF socket, as on the computer. Of course, this is no longer a real USB port. The socket of the charger only gives approximately 5 V between 1 and 4 of the contacts of the 4-pin nest (plus on Contact No. 1, minus on Contact No. 4). Well, all sorts of jumpers and resistors can be installed between different contacts of the socket. What for? This witchcraft will be discussed below.

The gadget can be connected to an unauthorized or homemade charger that gives 5 volts. And here it begins the most interesting ...

When you try to charge from someone else's charger with the USB output, your gadget can refuse to charge under the pretext that the charger is supposedly suitable for it. The impact is that many phones / smartphones are "watching" how the Data + and Data wires are covered, and if the gadget does not like something, it will be rejected.

Nokia, Philips, LG, SAMSUNG, HTC And many other phones recognize the charger only if the contacts of Data + and Data- (2nd and 3rd) will be shorted. You can hide them in the USB_AF socket of the charger and calmly charge your phone through the standard date cable.

If the charger already has a output cord (instead of an output jack), and you need to solder the Mini / Micro USB plug to it, do not forget to connect 2 and 3 contacts in the MINI / Micro USB itself. At the same time, plus solder 1 contact, and minus - on the 5th (last).

W. IPhonovin general, some occult requirements for switching the charger socket: Contacts Data + (2) and Data- (3) must be connected to the GND (4) pin through the resistors 49.9 kΩ, and with contact + 5V via resistors 75 kΩ.

Motorola."Requires" a resistor 200 com intermount 4 and 5 contacts of the USB MICRO-BM plug. Without a resistor, the machine is charged not to complete victory.

For charge Samsung Galaxy In the USB MICRO-BM plug, a resistor 200 com between 4 and 5 contacts and jumpers between 2 and 3 contacts should be installed.

For a more complete and "humane" charge of the tablet SAMSUNG GALAXY TAB. Recommend another scheme: two resistors: 33 kΩ between +5 and jumper D-D +; 10 kΩ between GND and the jumper D-D +.

Apparatus E-TEN. ("Rota") is not interested in the state of these contacts, and even a simple charger will support. But he has an interesting requirement for the charging cable - "Raccot" is charged only if contacts 4 and 5 are shorted in the Mini-USB plug.

If there is no desire to mess with a soldering iron, you can buy a USB-OTG cable - in the Mini-USB plug, contacts 4 and 5 are already closed. But then you still need a USB AM-AM adapter, that is, "dad" - "dad".

The Ginzzu GR-4415U car charger claiming on the versatility and its analogues are equipped with two output sockets: "HTC / SAMSUNG" and "Apple" or "iPhone". The pinout of these nests is shown below.

For nutrition or charge Navigator Garmin requires a special data cable. Just to power the navigator through a data cable is needed in the MINI-USB plug to shortfit 4 and 5 contacts. For the subfolder you need to connect 4 and 5 contacts through a resistor 18 kΩ:

So, if you want to remake the usual memory to USB charging for the phone:

Make sure the device gives about 5 volts of constant voltage

Find out whether it is able to give a current at least 500 mA

Make the necessary changes to Switch USB-AF or USB-MINI / Micro plug

The universal USB bus is one of the popular personal computer interfaces. It allows you to make a sequential connection of various devices (up to 127-units). Also, USB bus support the connection and shutdown function when the personal computer is running. In this case, devices can be powered directly through the mentioned element, which frees from the need to use additional power supplies. In this article, we will look at what is a standard USB pinout. This information can be useful when the manufacture of any USB adapters or devices receiving power through the interface we are considered. In addition, we will analyze what is a micro-USB pinout and, of course, mini-USB.

Description and dispenser USB interface

Almost every PC user knows how the USB connector looks like. This is a flat four-pin interface of type A. USB-connector "Mom" has an AF marking, and "dad" - am. Pointing USB type A consists of four contacts. The first wire is marked with red, the DC voltage is supplied +5 V. It is allowed to supply the maximum current equal to 500 mA. The second contact is white - designed for (D-). The third wire (green) is also used to transmit data (D +). The last contact is marked with black, zero power supply (shared wire) is fed.

Connectors of type A are considered active, they are connected to the supply host, etc.). Type B is considered passive, they attach devices such as printers, scanners, etc.. Type B connectors are a square with two beveled corners. "Mom" has a BF label, and "dad" - VM. Type B Type B Type has the same four contacts (two above and two below), appointment - identical type A.

Spacking micro-USB connectors

This type of connectors are most often used to connect tablets and smartphones. They are significantly smaller in size than the standard USB interface. Another feature is the presence of five contacts. The marking of such connectors has the following form: Micro-AF (BF) - "Mom" and Micro-AM (VM) - "Dad".

Pointing USB type micro:

The first contact (red) is designed to supply the supply voltage + 5 V;

The second and third wire (white and green colors) are used to transmit data;

The fourth contact (ID) in the type connector is not involved, and in the connectors of type A, it closes to the general wire to support the OTG function;

The last, fifth, contact (black) is zero tension.

In addition to the listed, in the cable there may be another wire used for "shielding"; The number is not assigned to him.

Pointing Mini USB

Mini USB type connections also contain five contacts. Mark these connectors as follows: mini-AF (BF) - "Mom" and mini-AM (VM) - "Dad". The connecting of contacts is identical to the micro-USB type.

Conclusion

Information on the splitting of wires for USB connectors is very relevant, since this type of interface is used in almost all mobile and desktop devices and gadgets. These connectors are used both for charge built-in batteries and data transfer.

Content:

In each computer and other similar devices, the most popular is the USB connector. Using USB wires it became possible to connect more than 100 units of the connected devices. These tires allow you to connect and disconnect any devices even during the operation of the personal computer. Almost all devices can be charged through this connector, so there is no need to apply additional power supplies. Collecting USB picking helps to accurately determine how the type of devices includes one or another tire.

USB device and assignment

The first ports of this type appeared in the nineties of the last century. After some time, these connectors updated to the USB 2.0 model. The speed of their work has increased more than 40 times. Currently, a new USB 3.0 interface has appeared in computers at a speed, 10 times higher than the previous option.

There are other types of connectors of this type, known as Micro and Mini USB, used in modern phones, smartphones, tablets. Each tire has its own or pinout. It may be necessary if you need to manufacture with your own hands an adapter from one type of connector to another. Knowing all the subtleties of the location of the wires, you can make even a charger for a mobile phone. However, it should be remembered that in case of incorrect connection, the device may be damaged.

USB 2.0 connector is made in the form of a flat connector in which four contacts are installed. Depending on the purpose, it is marked as AF (BF) and AM (BM), which corresponds to the everyday name "Mom" and "Dad". The mini and micro devices have the same marking. From ordinary tires, they differ in five contacts. The USB 3.0 external device resembles Model 2.0, with the exception of an internal structure that has nine contacts already.

Pickup-decaying connectors USB 2.0 and 3.0

The cutting of the wires in the USB 2.0 model is as follows:

1. A red conductor to which the feed is powered by its DC voltage with the value of + 5V.
2. White explorer used to transfer information data. It is indicated by the label "D-".
3. Explorer painted in green. With it, information is also transmitted. It is marked as "D +".
4. Black conductor. On it is made of zero feeding its voltage. It bears the name of its wires and is denoted by its own mark in the form of an inverted T.

The location of the wires in the 3.0 model is performed completely differently. The first four contacting wires fully correspond to the USB 2.0 connector.

The main difference between USB 3.0 lies in the following wires:

• Explorer No. 5 has blue. On it is transferred information with a negative value.
• Explorer No. 6 of yellow color, as well as the previous contact is designed to transmit information that has a positive value.
• Explorer No. 7 is used as an additional grounding.
• Explorer No. 8 purple and conductor No. 9 orange. They perform the function of receiving data, respectively, with a negative and positive value.

Split-pinboard micro and mini-USB connectors

Micro USB connectors are most often used in tablets and smartphones. From standard tires, the Micro USB pinout is characterized by much smaller dimensions and the presence of five contacts. They are marked as Micro-AF (BF) and Micro-AM (Bm), which corresponds to "Mom" and "Pape".

The micro-USB molding is performed in the following order:

• Contact number 1 red. It serves a voltage.
• Contacts Nos. 2 and 3 white and green color are used for transmission.
• Contact No. 4 of the lilac color performs special functions in separate tire models.
• Contact number 5 of black color is zero wire.

Pickup Mini USB Connector for Colors is performed, as well as in micro-yusb connectors.

It has been developed since 1994, while the development team consisted of engineers from advanced companies in the field of IT technologies - Microsoft, Apple, Intel and others. In the process of conducting research, one task was pursued - to find a universal port that could be used for most devices.

Thus, users were provided with a USB connector, which was almost immediately supported by various developers and began to be actively used in a variety of devices, ranging from personal computers and ending with mobile gadgets. However, it happened that the cables with such connectors could be used far from everywhere, and they themselves were different, in connection with which some need a mini-USB connector to make the appropriate adapter.

At the same time, few people know how this procedure should be implemented correctly.

The concepts you need to know

The splitting of the USB connector begins with the study of basic concepts:

• VCC - Positive Potential Contact For Modern USB Cables The indicator of this contact is +5 volts, it should be noted that in electolectric circuits such an abbreviation fully corresponds to PNP power voltage, as well as NPN transistors.
• GND - contact negative power supply potential. In modern equipment, including various patterns of motherboards, this device is connected to the case in order to ensure its effectively protected from static electricity or any external sources of electromagnetic interference.
• D- - information contact having zero potential relative to which information is translated.
• D + - informational contact having a logical unit. This contact is used to broadcast information from the host to the device or vice versa. At the physical level, this process is the transfer of rectangular pulses with a positive charge, while the impulses have different amplitudes and diet.
• Male is the plug of this connector, which among modern users, which is carried out with a USB connector for mouse and other devices, is often called "dad".
• Female - the socket in which the plug is inserted. Users are called "Mom".
• RX - receiving information.
• TX - information transfer.

USB-OTG.

OTG is a method of connecting through a USB cable of two peripheral devices without the need to use the computer. Also, such a flashing micro-USB connector in professional circles is often called USB-Host. In other words, a flash drive or some hard disk can directly connect to the tablet or a mobile phone in the same way as a full-fledged personal computer.

In addition, mice or keyboards can be connected to the gadgets if they support the possibility of using them. Often, it is often connected to cameras and other gadgets with printers.

What is the restrictions?

Restrictions that have such a flashing micro USB connector are as follows:

For example, if we are talking about connecting to a telephone of some USB flash drive, then in this case the "USB_AF-USB_AM_MICRO" adapter is most often used. In this case, a flash drive is inserted into the connector, while the plug connects to the mobile phone.

Feature cable

The main feature, which is distinguished by the splitting of the USB connector into OTG format, is that in the pin 4 plug, it must be closed with contact 5. In a standard data cable, this contact is not soldered at all, but is called this USB-BM plug Micro. It is for this reason that you need to get to the fourth contact, after which the jumper to attach it to the GND wire. After such a procedure, the plug will be renamed USB-AM Micro. It is precisely the presence of jumpers between these contacts in the plug allows the device to determine which one peripheral device is collected to it. In the event that this jumper does not see the device, they will be part of a passive device, and any flash drives connected to it will simply be completely ignored.

How are devices defined?

Many believe that when connected in OTG mode, both devices are fully automatically determined by which of them will be a host, and who will be subordinate. In fact, in this case, only the user defines the one who is in this case will be the master, since some device will stick a plug, equipped with a jumper between 4 and 5 contacts, then from them will be a host.

How to do it?

Through translucent isolation, you can consider several multi-colored wires. You will need to bore insulation near the black wire, after which one end of the jumper to fall to the GND contact. From the opposite side, you can see the white wire, as well as unused contact. In this case, we need to be improved isolation near the unused contact, after which it is to fall to it the second end of the jumper.

It is worth noting that the MICRO format USB displacement circuit is much simpler.

Running plug that you equipped with a jumper will need to be isolate, for which a specialized heat shrink tube is used. After that, you will need to just take "mom" from the extension cord and solder it to our plug color in color. If cables are shielded, then in this case you will need also, among other things, connect and screens.

Is it possible to charge?

If the device is connected to the device through OTG, then in this case it will have to feed it, which can significantly reduce the overall duration of the device from the battery built into it. In this regard, many are thinking about whether it is possible to recharge such a device through the external source. This is possible, but for this you need support for a special mode in the device, as well as a separate splitting of the USB connector for charging.

In fact, charging mode is most often envisaged by modern gadget developers, but not all allow such a procedure. At the same time, it should be noted that to transition to such a charging mode, a separate disintegration diagram of the USB connector should be used, in which the contacts are closed through a separate resistor.

The USB interface began to widely apply about 20 years ago, to be accurate, since the spring of 1997. It was then that the universal sequential tire was hardware implemented in many system boards of personal computers. Currently, this type of peripheral connection to the PC is the standard, versions were released, which allowed to significantly increase the rate of data exchange, new connectors appeared. Let's try to figure out the specification, pinouts and other USB features.

What are the advantages of a universal serial tire?

The implementation of this connection method made it possible:

• Prior to connecting various peripheral devices to a PC, starting from the keyboard and ending with external disk drives.
• To fully use the "Plug & Play" technology, which simplified the connection and configuration of the peripherals.
• Refusal from a number of outdated interfaces, which has positively affected the functional capabilities of computing systems.
• The bus allows not only to transmit data, but and to power the plug-in devices, with a limit for the load current of 0.5 and 0.9 and for the old and new generation. This made it possible to use USB to charge phones, as well as connecting various gadgets (mini fans, backlight, etc.).
• It became possible to manufacture mobile controllers, for example, USB network card RJ-45, electronic keys for input and exit system

Types of USB connectors - main differences and features

There are three specifications (versions) of this type of connection partially compatible with each other:

1. The very first option that has received widespread - V 1. is an improved modification of the previous version (1.0), which has practically not out of the prototype phase due to serious errors in the data transfer protocol. This specification has the following characteristics:

• Dual-mode data transmission at high and low speed (12.0 and 1.50 Mbps per second, respectively).
• The ability to connect more hundreds of different devices (including hubs).
• The maximum length of the cord is 3.0 and 5.0 m for high and low metabolism, respectively.
• Rated voltage of the tire - 5.0 V, permissible load current of the plug-in equipment - 0.5 A.

Today, this standard is practically not used due to low bandwidth.

1. The second specification dominating today .. This standard is fully compatible with the previous modification. A distinctive feature is the presence of a high-speed data exchange protocol (up to 480.0 Mbps per second).

Due to the full hardware compatibility with the younger version, the peripheral devices of this standard can be connected to the previous modification. True, at the same time, bandwidth decrease to 35-40 times, and in some cases more.

Since there are full compatibility between these versions, their cables and connectors are identical.

Understanding that, despite the bandwidth specified in the specification, the real rate of data exchange in the second generation is slightly lower (about 30-35 MB in a second). This is due to the feature of the implementation of the protocol, which leads to delays between data packets. Since modern drives have the read speed in four times higher than the bandwidth of the second modification, that is, it did not meet the current requirements.

1. The universal tire of the 3rd generation was designed specifically to solve the problems of insufficient bandwidth. According to the specification, this modification is able to exchange information at a speed of 5.0 Gbps per second, which is almost three times higher than the read speed of modern drives. Plugs and nests of the latest modification are taken to label blue to facilitate identification of affiliation to this specification.

Another feature of the third generation is an increase in the rated current to 0.9 A, which allows the power of a number of devices and refuse individual power supplies for them.

As for compatibility with the previous version, it is implemented partially, it will be described in detail below.

Classification and pickling

Connectors are customary to classify by type, there are only two of them:

Note that such convectors are compatible only between early modifications.

In addition, there are extension cords for the ports of this interface. At one of their end, a plug of type A was installed, and on the second nest under it, that is, in fact, the compound "Mom" is "dad". Such cords can be quite useful, for example, to connect a flash drive without climbing the table to the system unit.

Now consider how the contacts are cut for each of the types listed above.

Pointing USB 2.0 Connector (Types A and B)

Since physically plugs and nests of early versions 1.1 and 2.0 do not differ from each other, we bring the latter decay.

Figure 6. The plug of the plug and the jack of the type A

Designation:

• A - nest.
• B - plug.
• 1 - Power +5.0 V.
• 2 and 3 signal wires.
• 4 - weight.

In the picture, the contact coloring is shown in the colors of the wire, and corresponds to the adopted specification.

Now consider the decay of the classic nest V.

Designation:

• A - plug connected to the jack on the peripheral devices.
• B is a socket on the peripheral device.
• 1 - Power Contact (+5 V).
• 2 and 3 - signal contacts.
• 4 - Contact Wire "Mass".

The contacts of the contacts correspond to the collapse of the wires in the cord.

Pointing USB 3.0 (Types A and B)

In the third generation, the connection of peripheral devices is carried out at 10 (9, if there is no shielding braid) wires, respectively, the number of contacts is also enlarged. But they are located in such a way that there is an opportunity to connect early generation devices. That is, contacts +5.0 V, GND, D + and D- are also located as in the previous version. Space Socket type A is presented in the figure below.

Figure 8. Plotting Connector Type A in USB 3.0

Designation:

• A - plug.
• B - nest.
• 1, 2, 3, 4 - connectors fully correspond to the pinout plug for version 2.0 (see in Fig. 6), the colors of the wires also coincide.
• 5 (SS_TX-) and 6 (SS_TX +) data transmission wire connectors via Super_Speed.
• 7 - Mass (GND) for signal wires.
• 8 (SS_RX-) and 9 (SS_RX +) Connectors for receiving data for the Super_Speed \u200b\u200bprotocol.

The colors in the figure correspond to the generally accepted for this standard.

As mentioned above, you can insert a plug of an earlier sample in this port, respectively, the bandwidth will decrease. As for the plug of the third generation of the universal tire, it is impossible to bust it in the early release nests.

Now consider the split contact for the jack of type B. Unlike the previous species, such a nest is incompatible with any plug of early versions.

Designations:

A and B - plug and nest, respectively.

Digital signatures to contacts correspond to the description of Figure 8.

Color as close as possible to the color marking of wires in the cord.

Pickup micro USB connectivity

To begin with, we give a split for this specification.

As can be seen from the figure, this is a compound by 5 PIN, as in the plug (A) and the nest (c), four contacts are involved. Their appointment and digital and color designation meets the adopted standard that was given above.

Description Micro USB connector for version 3.0.

This connection uses the characteristic form connector by 10 PIN. In fact, it is two parts of 5 PIN each, and one of them fully complies with the previous version of the interface. Such implementation is somewhat incomprehensible, especially considering incompatibility of these types. Probably, the developers planned to make the possibility of working with the connectors of early modifications, but subsequently refused this idea or have not yet implemented it.

The figure shows the pinout plug (s) and the appearance of the nest (C) micro YUSB.

Contacts from the 1st to the 5th fully correspond to the micro-second-generation connotor, the appointment of other contacts as follows:

• 6 and 7 - data transmission by speed protocol (SS_TX and SS_TX +, respectively).
• 8 - Mass for high-speed information channels.
• 9 and 10 - receiving data on the high-speed protocol (SS_RX- and SS_RX +, respectively).

Pickup Mini USB

This connection option is applied only in early versions of the interface, in the third generation this type is not used.

As you can see, the plug of the plug and the socket is almost identical to the micro yusb, respectively, the color scheme of the wires and the contact numbers also coincide. Actually, differences are concluded only in form and sizes.

In this article, we only led the standard types of compounds, many of the manufacturers of digital technology practices the introduction of their standards, there you can meet connectors on 7 PIN, 8 PIN, etc. This makes certain difficulties, especially when the search for a charger's search for a mobile phone is up. It should also be noted that manufacturers of such "exclusive" products are in no hurry to tell how the USB pinout is performed in such contacts. But, as a rule, this information is easy to find on thematic forums.