What Is a MultiMediaCard?

The multimedia card (MMC) is a small (24x32 or 18x1.4mm) erasable solid-state memory card, which is called Multi-Media Card, and is especially used in mobile phones and digital imaging and other mobile terminals. This easy-to-carry, reliable, and lightweight standard data carrier can store up to 1GB of information, which is equivalent to 640,000 pages of information. For read-only applications, the multimedia card uses ROM or flash technology; for both read and write applications, the multimedia card uses flash technology.

Among MP3 / mobile phones / digital cameras / digital video cameras and other mobile memory cards, CF cards and SM cards are more familiar to everyone, but when it comes to mmc cards and sd cards, you may not be familiar with them, this article will give Please introduce the mmc card in detail.

The full name of MMC is "MultiMediaCard"-so it is also often called "Multimedia Card". It is a compact and large-capacity flash memory card. It was jointly developed by SANDISK and Siemens of Germany in 2000, and was developed by Amkor Technology Provide the most advanced module packaging technology services. The more common varieties are 16MB and 32MB. Initially, SanDisk provided its own IC dies, components and materials. Amkor then provided SanDisk with its best solution supply chain management system. Components and materials. At present, it is quite mature. Hitachi, Sandisk, Infineon and other major manufacturers are mass-producing MMC cards and have been widely used in mobile phones, digital cameras, digital video cameras, MP3 and other digital products.

A flash card is a memory that uses flash memory technology to store electronic information. It is generally used in digital cameras, handheld computers, MP3 and other small digital products as a storage medium, so it looks small and looks like a card, so Call it a flash card. According to different manufacturers and different applications, the flash memory card may be SmartMedia (SM card), Compact Flash (CF card), MultiMediaCard (

The access speed refers to the data transmission speed of the flash memory card when data is written or read. Different types of flash memory cards use different interface specifications, and naturally their respective access speeds are also different. Even the same type of memory card is subject to the manufacturing level of various manufacturers,

• RS-MMC card

• CF card

• SM card

• SD card

• xD card