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H27UCG8T2BTR-BC Datasheet(PDF) 14 Page - Hynix Semiconductor

Part No. H27UCG8T2BTR-BC
Description  64Gb(8192M x 8bit) MLC NAND Flash
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Maker  HYNIX [Hynix Semiconductor]
Homepage  http://www.skhynix.com/ko/index.jsp
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H27UCG8T2BTR-BC
64Gb(8192M x 8bit) MLC NAND Flash
Rev 0.1 / Oct. 2012
14
Figure 5 : Bad block management flow chart
Notes:
1. Do not try to erase the detected bad blocks, because the bad bock information will be lost.
2. Do not perform program and erase operation in invalid block, it is impossible to guarantee the
input data and to ensure that the function is normal.
1.11. Bad Block Management
Devices with Bad Blocks have the same quality level and the same AC and DC characteristics as devices where all
the blocks are valid. A Bad Block does not affect the performance of valid blocks because it is isolated from the
bit line and common source line by a select transistor. The devices are supplied with all the locations inside valid
blocks erased (FFh). The Bad Block Information is written prior to shipping. Any block where the 1st Byte in the
spare area of the first and last page does not contain FFh is a Bad Block. The Bad Block Information must be
read before any erase is attempted as the Bad Block Information may be erased. For the system to be able to
recognize the Bad Blocks based on the original information it is recommended to create a Bad Block table
following the flowchart shown in Figure 5. The 1st block, which is placed on 00h block address, is guaranteed to
be a valid block at the time of shipment.
16,384
16,384




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