f25l32qa Elite Semiconductor Memory Technology Inc., f25l32qa Datasheet - Page 18

• Manufacturer Part Number: f25l32qa
• Description: 3v Only 32 Mbit Serial Flash Memory With Dual And Quad
• Manufacturer: Elite Semiconductor Memory Technology Inc.

ESMT
Fast Read Quad Output (50 MHz ~ 100 MHz)
The Fast Read Quad Output (6B) instruction is similar to the Fast
Read Dual Output (3BH) instruction except the data is output on
bidirectional I/O pins (SIO
Enable (QE) bit of Status Register-2 must be set “1” to enable
Quad function. This allows data to be transferred from the device
at four times the rate of standard SPI devices.
Elite Semiconductor Memory Technology Inc.
Figure 7: Fast Read Quad Output Sequence
SCK
SIO
SIO
SIO
CE
SIO
Note: The input data du ring the dummy clocks is “don’t care”.
0
1
2
3
0
MODE0
MODE3
, SIO
However , the IO pins should be high-impefance piror to the fal ling edge o f the first data clock.
1
, SIO
MSB
0 1 2 3 4 5 6 7 8
2
and SIO
6B
HIGH IMPENANCE
HIGH IMPENANCE
HIGH IMPENANCE
(Preliminary)
3
). A Quad
MSB
ADD.
15 16
ADD.
The Fast Read Quad Output instruction is initiated by executing
an 8-bit command, 6BH, followed by address bits [A
dummy byte. CE must remain active low for the duration of the
Fast Read Dual Output cycle. See Figure 7 for the Fast Read
Quad Output sequence.
23 24
A DD.
31 32
Dummy
39 40
4 0 4 0
5 1 5 1 5 1 5 1 5 1
D
N
OU T
4142
Publication Date: Jan. 2009
Revision: 0.2
N+1
D
OUT
43 44 45 46 47 48
IO
0
4 0 4 0 4 0
N+2
D
switches from Input to Ouput
OUT
N+3
D
OU T
6 2
7 3
N+4
D
OUT
F25L32QA
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23
-A
0
] and a