What Is an SD Card Reader?

An SD card reader is a device that reads SD memory cards. SD Memory is the most common memory card currently on the market. The memory card is now widely used in digital cameras, DV, MP4, MP3 Walkman, PDA handheld computers, multimedia mobile phones. In order to facilitate the data carried by the memory card to be used by more people, a card reader was created.

SD card reader

An SD card reader is a device that reads SD memory cards. SD Memory is the most common memory card currently on the market. The memory card is now widely used in digital cameras, DV, MP4, MP3 Walkman, PDA handheld computers, multimedia mobile phones. In order to make the data carried by the memory card more accessible to more people, a card reader was created.

Chinese name

SD card reader

Foreign name

Security Digital Memory Card

Features

Device to read SD memory card

SD (Security Digital Memory Card) card reader is generally easy to carry, size and ordinary

The interface type refers to the connection method and type between the card reader and the host computer. Card readers use USB interface, divided into

When mentioning the card reader, many people immediately think that this product is produced with digital cameras, but now it is no longer limited to digital cameras, but has expanded into more fields. "Card reader" as its name implies is a device that reads data, but it not only supports reading data but also writing data. The initial design idea was mainly to make up for the shortcomings of digital camera data output. Because the early USB interface was not popular, the digital camera's output port was connected to the computer's serial port. Because the data transmission speed of the serial port is very low, if you copy these data to the hard disk, it will take a lot of waiting time Therefore, the reader came into being. With the development of MP3, PDA and other digital products, the development of card readers has been strongly promoted. Today, the standard 256M or 512M flash memory of MP3 is obviously not enough to meet our needs. Therefore, adding 1G or higher flash memory has become our standard configuration, but if we want to copy MP3 songs to flash memory, we can only use MP3. broadcast

Player, and at this time we need a dedicated connection, driver and software to complete, so the MP3 player is much less portable, and if we use a card reader at this time, MP3 is not needed at all The player's intervention can directly store MP3 songs on flash memory, so that MP3 becomes more convenient to use.

Card readers are divided into contact card readers, non-contact card readers, single interface card readers and dual interface card readers, and multi-card contact readers.

From the interface point of view, the card readers mainly include: parallel card readers, serial card readers, USB card readers, PCMICA card readers, and IEEE 1394 card readers. The first two card readers have been basically eliminated due to the slow interface or inconvenient installation. USB card reader is currently the most popular card reader on the market, PCMICA card reader is mainly used in notebook computers, and IEEE 1394 card reader is not popular because of the supported interface, it is not widely used.

The main flash or multimedia cards on the market today are: TF card, SM card, CF card, MicroDrive, MemoryStick, MemoryStick PRO, MMC card, Micro SD Card, MiniSD card, SD and SDHC, xD card.

According to the type of flash memory read, the card readers are divided into single-function card readers and multi-function card readers. Single-function card readers can generally only read one type of flash card. For example, TF card readers can only read TF card flash cards, and SM card readers can only read SM flash cards. The price is lower, usually 10-30 yuan; while the multi-function card reader is for all kinds of flash memory cartoons, whether it is TF card, CF card or MemoryStick, it can be easily read, but the price of such products is slightly higher Depending on the type of flash memory card, the price ranges from 8 to 38 yuan.

Secure Digital is usually abbreviated as SD . As a memory card, the full name should be Secure Digital Memory Card . The Chinese translation is a secure digital card or directly called SD card . It is a standard for memory cards. It is widely used in portable devices Use on, for example

SD card reader principle

Use U disk, MP3, card reader + SD card to start the computer to install XP. The principle is to make the computer start from the U disk (that is, the card reader + SD card) instead of running from the hard disk. Card device + SD card) is a complete system to start up and run, with several software such as GHOST. Then use GHOST to install the system. If the original hard disk is not backed up to the GHO file, you must copy a GHO file in the SD card before, or where do you go to restore the GHO file?

SD card reader manufacturing method

Card reader + SD card into the computer,

Extract the WinPEU package mentioned above,

After decompressing, double-click to run UltraISO inside. As shown below,

After running UltraISO, go to "File" to "Open" on the menu bar. Find the WinPE.iso file in the WinPEU software package, click to open, the operation is as shown below

Click to open the WinPE.iso file in the WinPEU software package, as shown below.

Then, in the local directory column, click to select the drive letter of your card reader + SD card, which is "H", and finally, on the menu bar, "Startup CD" to "Write Hard Disk Map"

Click write. After the burning is completed, your card reader + SD card boot disk will be ready. Don't forget to copy a GHO system file in the SD card, or where can you find a GHO file? Come to restore it. Remember that after GHOST restores the system, you need to unplug the card reader + SD, or start from your card reader + SD before the computer still enters the endless loop, you will still not be able to enter your restore interface.

Well, you can take a computer without a system and no CD-ROM drive to install the system without a disk. Also, set the startup sequence of the computer to be installed to: USB-ZIP to start,