Also known as T-Flash card, full name: TransFLash, aka: Micro SD, by Motorola and SANDISK **** with the research and development, launched in 2004. It is a kind of ultra-small card (11*15*1MM), about 1/4 of the SD card, can be counted as the smallest storage card.TF card can be used as SD card after SD card converter. The adapter can be used in devices that use SD as a storage medium.TransFlash is mainly developed for camera phones to capture large images and to be able to download larger video clips.TransFlash cards can be used to store personal data such as digital photos, MP3s, games, and applications for cell phones and personal data, and have a built-in copyright protection and management system to allow downloads of music, images, and video clips to be stored on the card. It also has a built-in copyright protection system to protect downloaded music, videos and games, and future versions of TransFlash will include encryption to protect personal data, financial records and healthcare documents. The compact size of TransFlash allows manufacturers to adopt this design without worrying about the size of the phone, and another flexible application is that it can be replaced by the supplier at any time prior to delivery to meet the different needs of the customer, an advantage not available with embedded flash memory.
Details:
◆Size is about half the size of a SIM card, with a built-in copy protection management system, suitable for a wide range of multimedia applications.
◆With the adapter, it can be used in digital products with an SD card slot.
◆Size: 11mm*15mm*1mm.
◆Applicable models: MOTO E398, V8, V635, V360, A780, A840, A1000, E770, MS400, V1010, V980 /SAMSUNG M339, M329, Z300, Z500, E848 / AMOI DV6,VV6,V980 /SAMSUNG M339, M329, Z300, Z500, E848 /SAMSUNG M339, M329, Z300, Z500, E848 AMOI DV6,V3/nokia 7310c and so on.
SD Card Introduction
SD Card (Secure Digital Memory Card), translated into Chinese as Secure Digital Card, is a new generation of memory device based on semiconductor flash memory, which is widely used in portable devices, such as digital cameras, personal digital assistants (PDAs), and multimedia players, etc. The SD card is made by Panasonic, Toshiba, and SanDisk Corporation of the United States. The SD card was developed by Matsushita, Toshiba and SanDisk in August 1999***. The size of the SD card is like a postage stamp, weighing only 2 grams, but with high memory capacity, fast data transfer rate, great flexibility in mobility, and excellent security.
The SD card combines SanDisk flash memory control with MLC (Multilevel Cell) technology and Toshiba's 0.16u and 0.13u NAND technology in a 24mm x 32mm x 2.1mm form factor, and connects to a dedicated drive via a 9-pin interface that requires no additional power to maintain the information memorized on it. And it's an all-in-one solid media without any moving parts, so there's no need to worry about damage from mechanical movement.
The technical construction of the SD card is based on the MultiMedia Card (MMC) format, and is about the same size as an MMC, measuring 32mm x 24mm x 2.1mm. the length and width are the same as an MMC, except that it's 0.7mm thicker than an MMC in order to accommodate a higher-capacity storage unit. the SD card maintains upward compatibility with the MMC card, which means that the MMC can be accessed by newer SD devices. SD cards are upwardly compatible with MMC cards, i.e., MMC can be accessed by newer SD devices, and compatibility depends on the application software, but SD cards cannot be accessed by MMC devices. (The SD card form factor utilizes the same rail design as the MMC thickness to allow the SD device to fit the MMC).
The SD connector retains the MMC's 7-pin header, but adds 2 extra pins on either side for data lines. NAND-type Flash Memory is used, which is basically the same as SmartMedia's, and is capable of an average data transfer rate of 2MB/s.
SD cards also offer different speeds, which are calculated based on the CD-ROM's rate calculation of 150kB/sec as a multiplier of 1x speed. Basically, they are capable of transferring up to 6x (900 kB/sec) faster than a standard CD-ROM, and high-speed SD cards are more capable of transferring 66x (10 MB/sec) and 133x or higher. Some digital cameras require high-speed SD cards for smoother movie shooting and faster continuous photo capture. As of December 2005, most devices follow the 1.01 specification for SD cards, and devices with higher speeds up to 133x follow the 1.1 specification.
Devices with an SD card slot can use smaller MMC cards, but standard SD cards cannot be inserted into the MMC card slot; SD cards can be used in CF and PCMCIA cards with an adapter, and miniSD and microSD cards can be used in the SD card slot with an adapter. Some USB connectors can be plugged into SD cards, and some card readers can be plugged into SD cards and accessed by a variety of ports, such as USB, FireWire, and so on.
The structure of an SD card ensures the security of digital file transfers and makes it easy to reformat, so it has a wide range of applications, and multimedia files such as music, movies, news, and so on, can be easily saved to an SD card. Therefore, many digital cameras have started to support SD card.
There are many brands of SD cards on the market today, such as SANDISK, Kingmax, Panasonic, and Kingston.
●SANDISK's SD cards, which are the most common on the market, are categorized into high-speed and low-speed SD cards.
●Kingmax SD card, using a unique integrated packaging technology (PIP), making it difficult for counterfeiters to copy, Kingmax SD card maximum transfer rate of 10MB / sec, with waterproof, shockproof performance, anti-pressure of the three anti-design, which can meet the field shooting a variety of requirements.
●Panasonic SD card, as the creator of the SD standard, its technology can be said to be one of the best SD cards on the market. However, it is important to note that most Panasonic SDs do not come with a warranty, so be sure to ask about the duration of the warranty when purchasing.
●Kingston SD cards, one of the smallest in the flash memory category, offer up to 5 years of warranty time.
Use of SD card
SD cards are used in the following handheld digital devices:
●Digital cameras for storing photos and videos
●Digital camcorders for storing photos and videos
●Personal digital assistants (PDAs) for storing various types of data
●Portable phones for storing photos, ringtones, music, and videos
●Multi-function phones for storing photos, ringtones, music, and videos
●Multi-function phones for storing photos, ringtones, and videos
●Multimedia player
SD card is mostly used in MP3 Walkman, digital camcorder, digital camera, etc., and also used in laptop computers. Its projection area is the same as MMC card, just slightly thicker, 2.1mm, but the capacity of SD card is much larger, and the read/write speed is also 4 times faster than MMC card. At the same time, the interface of SD card is compatible with MMC card, and most of the interfaces that support SD card support MMC card. At present, SD card in the digital camera is rapidly popularized, has become the mainstream trend. SD card in this year's development is very fast, has begun to threaten the CF card market share. This is due to the fact that the volume of SD card is much smaller than CF card, and SD card in the capacity, performance and price and CF card gap is getting smaller and smaller, and these two years support SD card cell phone quickly in the market, so the rapid growth of SD card is absolutely not a coincidence. The most important point is that MMC cards are also compatible with SD cards, which is one of the reasons why SD cards are rapidly gaining popularity. However, it is important to note that in some products such as cell phones, SD cards and MMS cards are not compatible. Today's SD cards range in capacity from 8MB to 4GB.