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I am developing embedded system that writes to SD card.
As you all know, write access is faster if flash is pre-erased.
Is there any easy way to erase flash memory in windows?
Thanks,
Yony.
The flash memory on an SD card is managed by an on-card controller, you do not have the level of control to directly erase the NAND flash itself.
However when doing a multi-block write (CMD25) you can precede it with a pre-erase command (ACMD23) to pre-erase the blocks; this is significantly faster. However if you specify a pre-erase then terminate the subsequent write, the content of the unwritten blocks is undefined according to the specification. Also pre-erasure is supported only on SD cards, not MMC cards. The details are in the SD Specifications Part 1 Physical Layer Simplified Specification