EMMC-TF

Micro SD Card, formerly known as Trans-flash Card (TF card), was officially renamed Micro SD Card in 2004. It was invented by SanDisk and is mainly used in mobile phones.
Before the launch of Micro SD, mobile phone manufacturers all used embedded memory. Although this type of module is easy to install, it has the problem of being unable to meet the actual needs of the trend - the capacity is limited and there is no room for upgrades. Micro SD imitates the application model of SIM cards, that is, the same card can be used in different models of mobile phones, so that mobile phone manufacturers no longer have to worry about the development and design of plug-in cards. Micro SD cards can be called removable storage ICs.
Micro SD card is an extremely small flash memory card. Its format was invented by SanDisk. Originally this memory card was called T-Flash, and later renamed Trans Flash; the reason for renaming it to Micro SD was because it was SD Association (SDA) adopted. Other memory cards adopted by SDA include Mini SD and SD cards. It is mainly used in mobile phones, but due to its small size and increasing storage capacity, it has been used in GPS devices, portable music players and some flash memory disks. Its size is 15mmx11mmx1mm, which is almost the same size as a fingernail. It is the smallest memory card currently available. It can also be connected to the SD card slot through an SD adapter card. Currently, Micro SD cards provide capacities of 128MB, 256MB, 512MB, 1G, 2G, 4G, 8G, 16G, 32G, 64G, and 128G (during the MWC 2014 World Mobile Communications Conference, SanDisk broke the memory card's maximum capacity of 64GB). Tradition has
 
officially released a Micro SD
0.1UF
PCB diagram:
 
Find a chip and blow it on
 
 
to test the speed.
The speed is okay. This card reader has the highest speed for any chip tested!