GD25LE256DFEG datasheet(60/83 Pages) GIGADEVICE

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1.8V Uniform Sector

Dual and Quad Serial Flash

GD25LE256D

7.37. Burst Read with Wrap for Higher 128Mb (8DH)

The

“Burst Read with Wrap for Higher 128Mb (8DH)” command provides an alternative way to perform the read

operation with

“Wrap Around” in QPI mode. This command is similar to the “Fast Read (0BH)” command in QPI mode,

except the addressing of the read operation will

“Wrap Around” to the beginning boundary of the “Wrap Around” once the

ending boundary is reached. The

“Wrap Length” and the number of dummy clocks can be configured by the “Set Read

Parameters (C0H)

” command. The “Burst Read with Wrap for higher 128Mb (8DH)” command will read out the memory

content from 1000000H to 1FFFFFFH.

The “Burst Read with Wrap for Higher 128Mb (8DH)” command sequence: CS# goes low  sending The “Burst Read

with Wrap for Higher 128Mb (8DH)

” command  sending 3-byte address (A23-A0, The A24 default value is 1)  sending

dummy byte  then data out.

Figure39. Burst Read with Wrap for Higher 128Mb command Sequence Diagram

CS#

SCLK

IO0

IO1

IO2

IO3

Command

8DH

A23-16

A15-8

A7-0

Dummy*

12 13

IOs switch from

Input to output

Byte1

Byte2

Byte3

*"Set Read Parameters" Command (C0H)

can set the number of dummy clocks

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