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W25Q128FVEIG Datasheet(HTML) 71 Page - Winbond

Part No. W25Q128FVEIG
Description  SERIAL FLASH MEMORY WITH DUAL/QUAD SPI & QPI
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Maker  WINBOND [Winbond]
Homepage  http://www.winbond.com
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W25Q128FVEIG Datasheet(HTML) 71 Page - Winbond

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W25Q128FV
Publication Release Date: October 01, 2012
- 70 -
Revision D
8.2.34 Set Read Parameters (C0h)
In QPI mode, to accommodate a wide range of applications with different needs for either maximum read
frequency or minimum data access latency, “Set Read Parameters (C0h)” instruction can be used to
configure the number of dummy clocks for “Fast Read (0Bh)”, “Fast Read Quad I/O (EBh)” & “Burst Read
with Wrap (0Ch)” instructions, and to configure the number of bytes of “Wrap Length” for the “Burst Read
with Wrap (0Ch)” instruction.
In Standard SPI mode, the “Set Read Parameters (C0h)” instruction is not accepted. The dummy clocks
for various Fast Read instructions in Standard/Dual/Quad SPI mode are fixed, please refer to the
Instruction Table 1-2 for details. The “Wrap Length” is set by W5-4 bit in the “Set Burst with Wrap (77h)”
instruction. This setting will remain unchanged when the device is switched from Standard SPI mode to
QPI mode.
The default “Wrap Length” after a power up or a Reset instruction is 8 bytes, the default number of
dummy clocks is 2. The number of dummy clocks is only programmable for “Fast Read (0Bh)”, “Fast
Read Quad I/O (EBh)” & “Burst Read with Wrap (0Ch)” instructions in the QPI mode. Whenever the
device is switched from SPI mode to QPI mode, the number of dummy clocks should be set again, prior to
any 0Bh, EBh or 0Ch instructions.
P5 – P4
DUMMY
CLOCKS
MAXIMUM
READ FREQ.
MAXIMUM
READ FREQ.
(A[1:0]=0,0)
MAXIMUM
READ FREQ.
(A[1:0]=0,0
VCC=3.0V~3.6V)
P1 – P0
WRAP
LENGTH
0 0
2
33MHz
33MHz
40MHz
0 0
8-byte
0 1
4
55MHz
80MHz
80MHz
0 1
16-byte
1 0
6
80MHz
80MHz
104MHz
1 0
32-byte
1 1
8
80MHz
80MHz
104MHz
1 1
64-byte
/CS
CLK
Mode 0
Mode 3
0
1
IO
0
IO
1
IO
2
IO
3
C0h
2
3
Read
Parameters
P4
P0
P5
P1
P6
P2
P7
P3
Instruction
Mode 0
Mode 3
Figure 48. Set Read Parameters Instruction (QPI Mode only)


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