EN27LN51208 Datasheet, PDF (36/46 Pages) Eon Silicon Solution Inc. – 512 Megabit (64 M x 8) SLC, 3.3 V NAND Flash Memory

EN27LN51208
11.4 Copy-Back Program
Copy-Back Program is designed to efficiently copy data stored in memory cells without time-consuming
data reloading when there is no bit error detected in the stored data. The benefit is particularly obvious
when a portion of a block is updated and the rest of the block needs to be copied to a newly assigned
empty block. Copy-Back operation is a sequential execution of Read for Copy-Back and of Copy-Back
Program with Destination address. A Read for Copy-Back operation with “35h” command and the
Source address moves the whole 2,112byte data into the internal buffer. The host controller can detect
bit errors by sequentially reading the data output. Copy-Back Program is initiated by issuing Page-Copy
Data-Input command (85h) with Destination address. If data modification is necessary to correct bit
errors and to avoid error propagation, data can be reloaded after the Destination address. Data
modification can be repeated multiple times as shown in Figure 29. Actual programming operation
begins when Program Confirm command (10h) is issued. Once the program process starts, the Read
Status command (70h) may be entered to read the status register. The host controller can detect the
completion of a program cycle by monitoring the R/B# output, or the Status bit (I/O6) of the Status
Register. When the Copy-Back Program is complete, the Status Bit (I/O0) may be checked. The
command register remains Read Status mode until another valid command is written to it.
Figure 28. Page Copy-Back Program Operation
Figure 29. Page Copy-Back Program Operation with Random Data Input
This Data Sheet may be revised by subsequent versions
or modifications due to changes in technical specifications.
©2013 Eon Silicon Solution, Inc., www.eonssi.com
Rev. A, Issue Date: 2013/09/30