How many bad blocks are present during manufacturing?
Cypress guarantees the total factory bad blocks and blocks that go bad during usage within the rated cycle limit will be no more than 2% of the total blocks in the device. You can find the bad block specification in the datasheet of the respective NAND device under the “Valid Blocks” Section.
The following table specifies the valid blocks (NVB) for various NAND devices:
|Device||Min – Max Good Blocks||Max Bad||Unit|
|S34MS01G2/G1||1004 - 1024||20||Blocks|
|S34MS02G2/G1||2008 - 2048||40||Blocks|
|S34MS04G2/G1||4016 - 4096||80||Blocks|
|S34MS08G2||8032 - 8192||160||Blocks|
|S34MS16G2||16057 - 16384||327||Blocks|
|S34ML01G2/G1||1004 - 1024||20||Blocks|
|S34ML02G2/G1||2008 - 2048||40||Blocks|
|S34ML04G2/G1||4016 - 4096||80||Blocks|
|S34ML08G2||8032 - 8192||160||Blocks|
|S34ML16G2||16057 - 16384||327||Blocks|