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H27UCG8T2BTR-BC Datasheet(PDF) 48 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
48
4.13. Copy-Back Program
Copy-Back program with Read for Copy-Back is configured to quickly and efficiently rewrite data stored in one
page without data reloading when the bit error is not in data stored. Since the time-consuming re-loading cycles
are removed, the system performance is improved. The benefit is especially obvious when a portion of a block is
updated and the rest of the block needs to be copied to the newly assigned free block. Copy-Back operation is a
sequential execution of Read for Copy-Back and of copy-back program with the destination page address. A read
operation with "35h" command and the address of the source page moves the whole 17,664byte data into the
internal data buffer. A bit error is checked by sequential reading the data output. In the case where there is no
bit error, the data do not need to be reloaded. Therefore, Copy-Back program operation is initiated by issuing
Page-Copy Data-Input command (85h) with destination page address. Actual programming operation begins
after Program Confirm command (10h) is issued. Once the program process starts, the Read Status Register
command (70h) may be entered to read the status register. The system controller can detect the completion of a
program cycle by monitoring the R/B# output, or the Status bit (I/O 6) of the Status Register. When the Copy-
Back Program is complete, the Write Status Bit (I/O 0) may be checked. The command register remains in Read
Status command mode until another valid command is written to the command register. During copy-back
program, data modification is possible using random data input command (85h) as shown in Figure 45.
Figure 45 : Copy-back program




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