GD9FS1G6F2AMG datasheet(25/55 Pages) GIGADEVICE

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GD9Fx1GxF2A

8.2.5 Copy-Back Program with Random Data Input (00H-35H)

The copy-back program is configured to quickly and efficiently rewrite data stored in one page without utilizing an external

memory. Since the time-consuming cycles of serial access and 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 is also needed

to be copied to the newly assigned free block. The operation for performing a copy-back program is a sequential execution

of page-read without serial access and copying-program with the address of destination page. A read operation with

“35h”command and the address of the source page moves the wholepage bytes data into the internal data buffer. As soon

as the device returns to Ready state, optional data read-out is allowed by toggling RE#, or Copy Back command (85H) with

the address cycles of destination page may be written. The Program Confirm command (10H) is required to actually begin

the programming operation. Data input cycle for modifying a portion or multiple distant portions of the source page is

allowed. When there is a program-failure at Copy-Back operation, error is reported by pass/fail status. But, if Copy-Back

operations are accumulated over time, bit error due to charge loss is not checked by external error detection/correction

scheme. Please note that Random Data Input (with/without data) is entered before Program Confirm command (10H) after

Random Data output.

Row.

Add2

Row.

Add1

Col.

Add2

Col.

Add1

00h

35h

Dout

Row.

Add1

Col.

Add2

Col.

Add1

85h

tWC

tRC

tRHW

Dout

tCS tCH

tWC

tADL

Dout

10h

70h Status

IO 0 = 0, pass

IO 0 = 1, fail

:Don't care

CE#

CLE

ALE

WE#

RE#

I/Ox

R/B#

Row.

Add2

tRR

tWB

tPROG

tWB

Figure 21: Copy-Back Program with Random Data Input figures

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