Flash memory card is a kind of memory that uses flash memory technology to store electronic information. Generally, it is used as a storage medium in digital cameras, palmtop computers, MP3 and other small digital products, so it looks like a card, so it is called a memory card. Memory cards can be used to store large files in mobile phones, such as songs, videos, documents and pictures. You can enter the file management of the mobile phone, copy and cut the files that need to be moved into the memory card for storage, thus releasing the storage of the mobile phone. Memory card, also called memory card, is an independent storage medium used in digital products such as mobile phones, digital cameras, portable computers and MP3 players. It is mainly used to store photos on digital cameras, music on mobile phones, files and movie videos, videos on digital cameras and data of MP3, MP4 and digital recording pens. Classification of memory cards:
1, MMC: The size of MMC card is 32mm×24mm× 1.4mm, with 7-pin interface and no read-write protection switch. Mainly used in digital cameras, mobile phones (such as Siemens MP3, mobile phone 6688), and some PDA products.
2.SD: The biggest feature is to ensure the security and confidentiality of data through encryption. SD card can be said to be an upgraded version of MMC. Both of them have the same appearance and working mode, but the thickness of MMC card is slightly thinner, but all machines using SD card devices can use MMC card.
3. Memory stick: Memory stick looks like chewing gum, the length is the same as that of ordinary AA battery, and the weight is only 4 grams. It adopts 10 pin interface structure and built-in write protection switch. Memory stick Memory stick has been widely used in digital cameras, PDA and digital video cameras.
4.PCIe flash card: Flash card is a kind of memory that uses flash technology to store electronic information. It is usually used as a storage medium in small digital products such as digital cameras, palmtop computers and MP3 players. PCIe belongs to high-speed serial point-to-point dual-channel high-bandwidth transmission. Connected devices are allocated exclusive channel bandwidth and do not enjoy resources. It mainly supports active power management, error reporting and other functions.