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25Q128FVPF 데이터시트(PDF) 39 Page - Winbond

부품명 25Q128FVPF
상세설명  SERIAL FLASH MEMORY WITH DUAL/QUAD SPI & QPI
PDF  99 Pages
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제조업체  WINBOND [Winbond]
홈페이지  http://www.winbond.com
Logo WINBOND - Winbond

25Q128FVPF 데이터시트(HTML) 39 Page - Winbond

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W25Q128FV
Publication Release Date: May 13, 2016
- 38 -
Revision M
8.2.9 Fast Read Quad Output (6Bh)
The Fast Read Quad Output (6Bh) instruction is similar to the Fast Read Dual Output (3Bh) instruction
except that data is output on four pins, IO0, IO1, IO2, and IO3. The Quad Enable (QE) bit in Status
Register-2 must be set to 1 before the device will accept the Fast Read Quad Output Instruction. The
Fast Read Quad Output Instruction allows data to be transferred at four times the rate of standard SPI
devices.
The Fast Read Quad Output instruction can operate at the highest possible frequency of FR (see AC
Electrical Characteristics). This is accompli
shed by adding eight “dummy” clocks after the 24-bit
address as shown in Figure 20. The dummy clocks allow the device's internal circuits additional time for
setting up the initial address. The input data during the dummy clocks is “don’t care”. However, the IO
pins should be high-impedance prior to the falling edge of the first data out clock.
/CS
CLK
Mode 0
Mode 3
0
1
2
3
4
5
6
7
Instruction (6Bh)
High Impedance
8
9
10
28
29
30
32
33
34
35
36
37
38
39
4
0
24-Bit Address
23
22
21
3
2
1
0
*
31
31
/CS
CLK
Dummy Clocks
0
40
41
42
43
44
45
46
47
5
1
High Impedance
4
5
Byte 1
High Impedance
High Impedance
6
2
7
3
High Impedance
6
7
High Impedance
4
0
5
1
6
2
7
3
4
0
5
1
6
2
7
3
4
0
5
1
6
2
7
3
Byte 2
Byte 3
Byte 4
IO
0 switches from
Input to Output
IO
0
IO
1
IO
2
IO
3
IO
0
IO
1
IO
2
IO
3
= MSB
*
Figure 20. Fast Read Quad Output Instruction (SPI Mode only)



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