The role of the MS card adapter with ten interfaces

TF card, also known as microSD or T flash, is one of the SD standards adopted by the SD Association. There are three modes of operation, SPI mode (independent sequence input and sequence output), 1-bit SD mode (independent instruction and data channels, unique transmission format), and 4-bit SD mode (using additional pins and some reconfigured pins). Supports four-bit-wide parallel transmission).

Its interface pins are defined as:

The 8 feet (from left to right) are as follows.

SPI modes: RSV, CS, DI, VDD, SCLK, VSS, DO, and RSV

SD mode: dat2, dat3, cmd, vcc, clk, gnd, dat0, dat1

The MS can't find its interface pin definition, but compared with the interface pin definition of the SD card and the predecessor of the SD card, the MD card, it can be found that SD has two more data lines than MMC to increase the data transmission rate, and TF has one less ground wire than SD, plus the data transmission rate of MS Pro Duo in parallel mode 160MPBS and electrical characteristics, it is speculated that the two extra pins on MS may be used for the ground wire of the power supply circuit and enhance the data transmission bandwidth.

The adapter is also called an interface. Its role is to achieve matching and synchronization between high-speed CPU and low-speed peripherals, and complete all data transmission and control between the peripherals of the lead-type computer.

Power adapter, also known as external power supply, is a small portable electronic equipment and electronic appliances power supply conversion equipment, generally composed of shell, power transformer and rectifier circuit, according to its output type can be divided into AC output type and DC output type; According to the connection method, it can be divided into wall type and desktop type. It is widely used in sub-parent machines, game consoles, language repeaters, walkmans, laptops, cellular and other equipment.

The power adapter functions as a transformer and rectifier. The home AC is 220V, and our computer is 12V DC (as if it is), so it is certain that the power adapter is a transformer and rectifier. Then the adapter is a transformer, we should all know that AC 220V transforms voltage through the transformer, and changes DC through the rectifier, there is consumption here, and these consumption will be converted into heat, so it is normal for the power adapter to heat up.

The transformer is made of silicon steel sheets, and after the transformer is energized, it generates magnetic flux, which will cause the silicon steel sheets to produce forceful action, resulting in a humming sound, which is normal. However, the sound of overheating is not normal, and there are many reasons: 1. The alternating current voltage is unstable.

2. The chip is damaged. 3. Inter-turn short circuit. 4. The component is damaged.

The main function of the power adapter is to convert 220V AC power into low-voltage DC power for the normal operation of electrical appliances.

It's a charger, which can also be understood as a power supply, and you need to use it for mobile phones and notebooks.

In general, the adapter is the power converter. It is used to convert the voltage and current of the mains.

Adapters, you have to look at what adapters are, there are so many adapters, of course, there are many roles, mainly energy conversion and information exchange.

An adapter is an interface converter, which can be a stand-alone hardware interface device, which allows a hardware or electronic interface to be connected to other hardware or electronic interfaces, or an information interface.

Please refer to the encyclopedia.

There is no unified standard for this, you need to open it and look at it, and you will know.

Look at the picture below, there is some misalignment, be careful.

Adapter (Transformer) Mode: Transforms the interface of one class into another interface that the client expects, so that two classes that would otherwise not work together due to interface mismatch can work together. The adaptation class can return a suitable instance to the client based on the parameters.

The orchestration mode is mainly after the program is written, and it encounters the need to use a new object, and the new object and the original object are essentially the same, but the methods and properties are not the same, so in order to reduce the modification of **, just like the power adapter, a way to use different objects.

To put it simply, the network card is inserted into the expansion slot of the computer or server, and exchanges data and shares resources with the network through the network cable.

The adapter is actually an evolution of the interface event, which is equivalent to a trigger, and to put it simply, it is just some actions. For example, mouse presses, clicks, keyboards, and so on. An adapter is a class that implements an interface event, but it's not really implemented, it's just an empty implementation, and there is no specific method body.

The adapter is mainly designed to facilitate the programmer's operation and avoid repetitiveness. As soon as an object or property has this adapter added, it will monitor the object or property. For example, say a button.

Press button to add a mouseadapter adapter and override the mouseclicked(mouseevent e) method inside.

public void mouseclicked(mouseevent e)

When you click on the button, the background is printed "You clicked the mouse".To be clear, it's like you've added a mouse object to the button. You can use the mouse to generate the corresponding action!

Listen for specific types of events.

For example, upstairs mouseadapter, only listens for mouse type events, other events are ignored, if the listening control is registered, a mouse event occurs, the listener generates a mouseevent instance, the listener notifies the system, and the system passes all the processing methods of mouseevent. If there is processing, it will be called, and if it is not processed, it will not be called.

It is convenient to create a listener object without inheriting the listener interface and to implement all the methods of the interface, inherit the event adapter class and override the event method you want to respond to.

For example, if the MouseAdapter implements the MouseListener, MouseWheelListener, and MousEmotionListener interfaces, and the methods are all empty, you can override the MouseClicked(MouseEvent E) method in response to the mouse button click on the component, and override the MousedRagged(MouseEvent E) method in response to mouse button pressing and dragging events on the component, and so on.

In fact, an adapter is just a class that implements some kind of interface and provides a method body.

In this way, when you use this interface again, you can directly inherit the adapter, so that you don't need to fill in every method in the interface again, you only need to repeat the methods you need to use in this class. It's so simple and convenient.

Methods that are implemented in the same way can be written in the keyadapter, and different methods can be implemented in a subclass of the keyadapter.

Shouldn't the class implementation interface use implements??

That is, people often say that the network card, which is a hardware device connected to the network.