SD 卡 & SD 内存卡 All In One

SD Association / SD 协会

https://www.sdcard.org/

SD 卡家族

https://www.sdcard.org/developers/sd-standard-overview/sd-family/

SD 卡`标准`

标准 SD 卡参数：尺寸大小，规格型式，针脚数，电压，写保护开关

SD
microSD

https://www.sdcard.org/developers/sd-standard-overview/

SD 卡`分类`

SD Cards
SDHC Cards
SDXC Cards
SDUC Cards

https://www.sdcard.org/ver_9_0_promotion/

Capacity (SD/SDHC/SDXC/SDUC)

There are four standards for capacity:
SD standard – Up to 2GB SD memory card using FAT12 and FAT16 file systems
SDHC standard – over 2GB~32GB SDHC memory card using FAT32 file system
SDXC standard – over 32GB~2TB SDXC memory card using exFAT file system
SDUC standard – over 2TB~128TB SDUC memory card using exFAT file system

https://www.sdcard.org/developers/sd-standard-overview/capacity-sd-sdhc-sdxc-sduc/

https://www.sdcard.org/consumers/about-sd-memory-card-choices/sd-sdhc-sdxc-and-sduc-card-capacity-choices/

SD 卡`速度`

Class 10 / U1 / V10, 读取速度 10MB/s / 10MB/sec

NS mode C2, C4, C6

HS mode C2, C4, C6, C10 / V6, V10

UHS-I mode: C2, C4, C6, C10 / U1, U3 / V6, V10, V30

UHS-II mode: C4, C6, C10 / U1, U3 / V6, V10, V30, V60, V90

UHS-III mode: C4, C6, C10 / U1, U3 / V6, V10, V30, V60, V90

The Speed Classes defined by the SD Association are Class 2, 4, 6 and 10.
Class 10 can be applied to High Speed Bus IF product family.
The UHS Speed Classes defined by the SD Association are UHS Speed Class 1 (U1) and UHS Speed Class 3 (U3).
U1 and U3 can be applied to UHS Bus IF product family (UHS-I, UHS-II & UHS-III).
The Video Speed Classes defined by the SD Association are V6, 10,30,60 and 90.
V6 and V10 can be applied to High Speed and UHS Bus IF product family.
V30 can be applied to UHS Bus IF product family.
V60 and V90 can be applied to UHS-II / UHS-III product family.