GD25LQ128CSIS datasheet(31/73 Pages) GIGADEVICE

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1.8V Uniform Sector

Dual and Quad Serial Flash

GD25LQ128C

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, in standard SPI mode.

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. In QPI mode, the

“Burst Read with Wrap (0CH)” command should be used to perform the Read Operation with

“Wrap Around” feature. The Wrap Length set by W5-W6 in Standard SPI mode is still valid in QPI mode and can also be

re-configured by

“Set Read Parameters (C0H) command.

Figure14. Set Burst with Wrap Sequence Diagram

Command

77H

CS#

SCLK

SI(IO0)

SO(IO1)

9 10 11 12 13 14 15

W6-W4

WP#(IO2)

HOLD#(IO3)

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