W25Q80BV
Publication Release Date: Augest 01, 2012
- 27 - Revision G
7.2.11
Fast Read (0Bh)
The Fast Read instruction is similar to the Read Data instruction except that it can operate at the highest
possible frequency of F
R
(see AC Electrical Characteristics). This is accomplished by adding eight
“dummy” clocks after the 24-bit address as shown in figure 10. The dummy clocks allow the devices
internal circuits additional time for setting up the initial address. During the dummy clocks the data value
on the DO pin i
s a “don’t care”.
/CS
CLK
DI
(IO
0
)
DO
(IO
1
)
Mode 0
Mode 3
0
1
2
3
4
5
6
7
Instruction (0Bh)
High Impedance
8
9
10
28
29
30
31
24-Bit Address
23
22
21
3
2
1
0
Data Out 1
*
/CS
CLK
DI
(IO
0
)
DO
(IO
1
)
32
33
34
35
36
37
38
39
Dummy Clocks
High Impedance
40
41
42
44
45
46
47
48
49
50
51
52
53
54
55
7
6
5
4
3
2
1
0
7
Data Out 2
*
7
6
5
4
3
2
1
0
*
43
31
0
= MSB
*
Figure 10. Fast Read Instruction Sequence Diagram