GD25LQ40xIGx 1.8V Uniform Sector Dual and Quad Serial Flash
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7.31. Set Read Parameters (C0H)
In QPI mode the “Set Read Parameters (C0H)” command can be used to configure the number of dummy
clocks for “Fast Read (0BH)”, “Quad I/O Fast Read (EBH)” and “Burst Read with Wrap (0CH)” command, and
to configure the number of bytes of “Wrap Length” for the “Burst Read with Wrap (0CH)” command. The “Wrap
Length” is set by W5-6 bit in the “Set Burst with Wrap (77H)” command. This setting will remain unchanged
when the device is switched from Standard SPI mode to QPI mode.
P5-P4
Dummy Clocks Maximum Read Freq.
P1-P0
Wrap Length
0 0
0 1
1 0
1 1
4
4
6
8
80MHz
80MHz
0 0
0 1
1 0
1 1
8-byte
16-byte
32-byte
64-byte
120MHz
120MHz
Figure 33. Set Read Parameters command Sequence Diagram
CS#
0
1
2
3
SCLK
Command
C0H
Read
Parameters
P4 P0
IO0
P5 P1
P6 P2
P7 P3
IO1
IO2
IO3
Rev.1.0
59 - 46
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