HY27UF084G2B Hynix Semiconductor, HY27UF084G2B Datasheet - Page 47

• Manufacturer Part Number: HY27UF084G2B
• Description: 4gb Nand Flash
• Manufacturer: Hynix Semiconductor

Bad Block Replacement
Over the lifetime of the device additional Bad Blocks may develop. In this case the block has to be replaced by copying
the data to a valid block. These additional Bad Blocks can be identified as attempts to program or erase them will give
errors in the Status Register.
Unlike the case of odd page which carries a possibility of affecting previous page, the failure of a page program oper-
ation does not affect the data in other pages in the same block, the block can be replaced by re-programming the cur-
rent data and copying the rest of the replaced block to an available valid block.
Refer to Table 23 and Figure 30 for the recommended procedure to follow if an error occurs during an operation.
Rev 0.4 / Jan. 2008
NOTE :
1. An error occurs on n
2. Data in Block A is copied to same location in Block B which is valid block.
3. N
4. Bad block table should be updated to prevent from eraseing or programming Block A
th
data of block A which is in controller buffer memory is copied into n
Operation
Program
Erase
Read
th
page of the Block A during program or erase operation.
Figure 30: Bad Block Replacement
Table 23: Block Failure
Recommended Procedure
4Gbit (512Mx8bit) NAND Flash
ECC (with 1bit/528byte)
Block Replacement
Block Replacement
HY27UF(08/16)4G2B Series
th
page of Block B
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