w25q64dw Winbond Electronics Corp America, w25q64dw Datasheet - Page 29

• Manufacturer Part Number: w25q64dw
• Description: 1.8v 64m-bit Serial Flash Memory With Dual/quad Spi & Qpi
• Manufacturer: Winbond Electronics Corp America

Fast Read (0Bh) in QPI Mode
The Fast Read instruction is also supported in QPI mode. When QPI mode is enabled, the number of
dummy clocks is configured by the “Set Read Parameters (C0h)” instruction to accommodate a wide
range applications with different needs for either maximum Fast Read frequency or minimum data access
latency. Depending on the Read Parameter Bits P[5:4] setting, the number of dummy clocks can be
configured as either 2, 4, 6 or 8. The default number of dummy clocks upon power up or after a Reset
instruction is 2.
CLK
/CS
IO
IO
IO
IO
0
1
2
3
Mode 3
Mode 0
Instruction
*
the number of dummy clocks.
"Set Read Parameters" instruction (C0h) can set
0
0Bh
1
Figure 11b. Fast Read Instruction (QPI Mode)
20
21
22
23
A23-16
2
16
17
18
19
3
12
13
14
15
A15-8
4
10
11
8
9
5
- 29 -
4
5
6
7
A7-0
6
0
1
2
3
7
Dummy
4
5
6
7
8
0
1
2
3
*
Publication Release Date: January 13, 2011
9
4
5
6
7
Byte 1
10
0
1
2
3
11
IOs switch from
Input to Output
4
5
6
7
Byte 2
12
0
1
2
3
13
Preliminary - Revision C
W25Q64DW
4
5
6
7