GD25B127DFES datasheet(25/65 Pages) GIGADEVICE

25 / 65 page

3.3V Uniform Sector

Dual and Quad Serial Flash

GD25B127D

7.13.

Set Burst with Wrap (77H)

The Set Burst with Wrap command is used in conjunction with “Quad I/O Fast Read” and “Quad I/O Word Fast Read”

command to access a fixed length of 8/16/32/64-byte section within a 256-byte page.

The Set Burst with Wrap command sequence: CS# goes low Send Set Burst with Wrap command Send 24

dummy bits 

Send 8 bits “Wrap bits”  CS# goes high.

W6,W5

W4=0

W4=1 (default)

Wrap Around

Wrap Length

Wrap Around

Wrap Length

0, 0

Yes

8-byte

N/A

0, 1

Yes

16-byte

N/A

1, 0

Yes

32-byte

N/A

1, 1

Yes

64-byte

N/A

If the W6-W4 bits are set by the

Set Burst with Wrap command, all the following “Quad I/O Fast Read” and “Quad I/O

Word Fast Read” command will use the W6-W4 setting to access the 8/16/32/64-byte section within any page. To exit the

“Wrap Around” function and return to normal read operation, another Set Burst with Wrap command should be issued to set

W4=1.

Figure15. Set Burst with Wrap Sequence Diagram

Command

77H

CS#

SCLK

SI(IO0)

SO(IO1)

9 10 11 12 13 14 15

W6-W4

IO2

IO3

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