The so-called effective means for data storage capacity of some

NAND-type flash memory and NOR flash memory cell is the basic bit, the user can randomly access any one bit of information.The NAND-type flash memory cell is the basic page (you can see, NAND-type flash memory disk sectors for similar pages, a sector of the hard drive is also 512 bytes). Effective capacity of each page is a multiple of 512 bytes.

 

 

The so-called effective means for data storage capacity of some, in fact, plus 16 bytes of parity information, so we can Sandisk flash memory manufacturers technical information materials were seen "(512 +16) Byte" in the representation. Following the current capacity of 2Gb NAND flash memory most is (512 +16) bytes of the page capacity, 2Gb NAND flash memory capacity than page size will be expanded to (2048 +64) bytes.

 

 

NAND-type flash memory in blocks erase operation. Flash write operations must be conducted in the blank area, if the target area has been the data must be erased to write, so the flash memory erase operation is the basic operation. Generally speaking, each block contains 32 pages of 512 bytes, size 16KB; and large-capacity flash memory using 2KB pages, each block contains 64 pages, size 128KB.

 

 

NAND-type flash memory each tablet I / O interfaces is usually 8, each transmission of each data line (512 +16) bit of information, 8 is (512 +16) × 8bit, that is to say in front of 512 bytes. But the larger-capacity NAND-type flash memory is also increasing use of 16 I / O line design, such as Samsung number K9K1G16U0A 64M × 16bit chip is a NAND-typeflash memory, capacity 1Gb, basic data unit is (256 +8 ) × 16bit, or 512 bytes.