W25X05CLUXIG-TR Datasheet, PDF (19/47 Pages) Winbond – 1M-BIT SERIAL FLASH MEMORY WITH 4KB SECTORS AND DUAL I/O SPI

W25X10CL
8.1.16 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 FR (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 DI pin is a “don’t care”.
/CS
CLK
DI
(IO₀)
DO
(IO₁)
/CS
CLK
DI
(IO₀)
DO
(IO₁)
Mode 3
Mode 0
0 1 2 3 4 5 6 7 8 9 10
28 29 30 31
Instruction (0Bh)
24-Bit Address
23 22 21
*
High Impedance
3210
* ^{= MSB}
31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55
Dummy Clocks
0
High Impedance
Data Out 1
Data Out 2
76543210765432107
*
*
Figure 10. Fast Read Instruction Sequence Diagram
- 19 -
Publication Release Date: February 17, 2014
Revision G