- Application Performance Class 1 (A1) was defined by SD Physical 5.1 specification. Not only for storing maps, pictures, videos, music, dictionary and documents, it also enables user to be freed form sluggish for editing and updating data
- Application Performance Class 2 (A2) is defined by SD Physical 6.0 specification. It makes SD memory card much higher performance than A1 performance by using functions of Command Queuing and Cache. Efficient flash memory management can be supported by Maintenance functions. Application Performance Class can be applied to UHS SDHC/SDXC Memory Card product family
|
Application Performance Class |
Minimum Random Read |
Minimum Random Write |
Minimum Sustained Sequential Write |
|---|---|---|---|
|
Class 1 (A1) |
1500 IOPS |
500 IOPS |
10MBytes/sec |
|
Class 2 (A2) |
4000 IOPS |
2000 IOPS |
10MBytes/sec |