thatoneguy
- Joined Feb 19, 2009
- 6,359
It is still mostly the same, just much, much smaller, which gives less capacitance and more storage for a given chip area.I myself am kind of curious as to how the flash speeds have been reduced so dramatically. The original reason for long FLASH write times relative to read times was the time it took to charge the capacitance of a floating gate. If that is no longer a limitation then I suspect the use of a different technology.
SD cards are marked with what "Class" they are, for a given size, say 2GB, Class 2, 4 and 6 and others can exist. They are downward compatible, but not upward compatible for speed.