SD card classification(1)

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SD card classification(1)

MiniSD

SD card is a little bloated for small digital products such as mobile phones. At the same time, in order to catch up with duo and XD, SD card camp published a smaller memory card, named "miniSD". Its overall dimension is 20 mm × 21.5 mm × 1.4 mm, the package area is 44% of the original SD card, the volume is 63% of the original SD card, and it has 11 gold fingers (only 9 SD cards). It can also be used as SD card. The card is widely used in mobile phones such as Dopod and Panasonic.

MicroSD

MicroSD card standard was established by SD Association in 2005 by referring to the relevant standards of T-Flash. T-Flash card and microSD card are compatible with each other. Compared with miniSD card, microSD card is smaller in size, 11mm × 15mm × 1.4mm. It is only about a quarter of the standard SD card. It is the smallest memory card in the market.

T-Flash card

Full name: transflash, jointly developed by Motorola and SanDisk, was launched in 2004. It's a super small card (11 * 15 * 1mm), about 1 / 4 of the SD card. It's the smallest memory card at present. TF card can be used as SD card after SD card converter. The adapter can be used on devices using SD as the storage medium. Transflash is mainly developed for photographing large-scale images and downloading large-scale video clips. The transflash card can be used to store personal data, such as digital photos, MP3, games, applications and personal data for mobile phones, and also has a copyright protection management system to protect downloaded music, images and games; the new transflash card launched in the future also has encryption function to protect personal data, financial records and health and medical documents. The compact transflash allows manufacturers to adopt this design without worrying about the volume of the phone, while another flexible application is that the supplier can replace it according to the different needs of customers at any time before delivery, which is an advantage that [1] embedded flash does not have.