Bulk sd cards and bulk TF cards recently often asked by about some netizens, so let’s look at the difference between them?
The 8 things of memory card guideline
1. Bulk sd cards definition: What is an SD CARD?
The SD card (namely Secure Digital Memory Card). It is a new-generation memory device based on semiconductor flash memory. It is widely used in portable devices such as digital cameras, personal digital assistants (PDAs) and multimedia players.
2. Bulk TF cards definition: What is a TF CARD?
MicroSD card is a very small flash memory card, the format is derived from SanDisk creation, the original memory card is called T-Flash, and later renamed as TransFlash; and the reason for renaming it as microSD is because of the SD Association (SDA) adoption. Other memory cards adopted by SDA include bulk miniSD and bulk SD cards.
3. Different appearance
SD card has a volume of (24mm × 32mm × 2.1mm) with a width of 2.4 cm, a length of 3.2 cm, and a thickness of 2.1 cm. Bulk memory cards used in cameras are generally SD cards.
The volume of TF is (11 * 15 * 1 mm), which is more than 1 cm wide, 1.5 cm long and only 1 mm thick. Bulk memory cards used in mobile phones are generally TF cards.
4. Definition is different
The pin definition of the SD card is different from that of the Micro SD (TF) card.
- SD card: 1-data3,2-cmd, 3-vss, 4-vdd, 5-clk, 6-vss, 7-data0,8-data1,9-data2.
- TF card (SD mode): 1-data2, 2-data3, 3-cmd, 4-vdd, 5-clk, 6-vss, 7-data0, 8-data1.
- TF card (SPI mode): 1-rsv, 2-cs, 3-di, 4-vdd, 5-sclk, 6-vss, 7-do, 8-rsv.
5. Different uses
Bulk sd cards are widely used in MP3 players, digital camcorders, digital cameras, etc., as well as laptop computers.
The TF card is mainly for mobile phones use, but it has the advantage of a very small volume, with the ever-increasing capacity, it slowly began to GPS devices, portable music players, and some flash memory disks use.
6. Different security
There is usually a switch on the right of the SD card, which is the overwrite protection switch, but the MMC card does not. When the overwrite protection switch is turned off, the SD card will be overwritten and the data can only be read.
TF card is not, but TF card can be converted into Minisd card and SD card through the card sleeve.
7. Different bulk sd cards and bulk TF cards capacity
SD card capacity has a level.
SD capacity is 8MB, 16MB, 32MB, 64MB, 128MB, 256MB, 512MB, 1GB, and 2gb sd card bulk.
SDHC capacity is 2GB, 4GB, 8GB, 16GB, and 32GB
SDXC capacity is 32GB, 48GB, 64GB, 128GB, 256GB, 512GB, 1TB, 2TB
TF card capacity are 64G, 32G, 16G, 8G, 6G, 4G, 2G, 1G, 512M, 256M, and 128M.
8. Compatible different
The SD slot supports MMC cards, and smaller MMC card variants are compatible with devices that support SD cards.
Unlike miniSD and micro sd bulk , the RS-MMC slot is compatible with full-size MMC cards. Because the RS-MMC card is just a shortened MMC card.
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From Dellwa salesman
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