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GD25VQ80C データシート(PDF) 23 Page - GigaDevice Semiconductor (Beijing) Inc.

部品番号 GD25VQ80C
部品情報  Uniform Sector Dual and Quad Serial Flash
PDF  55 Pages
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メーカー  GIGADEVICE [GigaDevice Semiconductor (Beijing) Inc.]
ホームページ  http://www.gigadevice.com/
Logo GIGADEVICE - GigaDevice Semiconductor (Beijing) Inc.

GD25VQ80C データシート(HTML) 23 Page - GigaDevice Semiconductor (Beijing) Inc.

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Uniform Sector
Dual and Quad Serial Flash
GD25VQ80C
23
7.12.
Quad I/O Word Fast Read (E7H)
The Quad I/O Word Fast Read command is similar to the Quad I/O Fast Read command except that the lowest
address bit (A0) must equal 0 and only 2-dummy clock. The command sequence is shown in followed Figure13. The first
byte addressed can be at any location. The address is automatically incremented to the next higher address after each byte
of data is shifted out. The Quad Enable bit (QE) of Status Register (S9) must be set to enable for the Quad I/O Word Fast
read command.
Quad I/O Word Fast Read with “Continuous Read Mode”
The Quad I/O Word Fast Read command can further reduce command overhead through setting the “Continuous
Read Mode” bits (M7-0) after the input 3-byte address (A23-A0). If the “Continuous Read Mode” bits (M7-0) =AXH, then the
next Quad I/O Word Fast Read command (after CS# is raised and then lowered) does not require the E7H command code.
The command sequence is shown in followed Figure14
. If the “Continuous Read Mode” bits (M7-0) are any value other than
AXH, the next command requires the first E7H command code, thus returning to normal operation. A “Continuous Read
Mode” Reset command can be used to reset (M7-0) before issuing normal command.
Figure 13. Quad I/O Word Fast Read Sequence Diagram (M7-0= 0XH or not AXH)
Figure 14. Quad I/O Word Fast Read Sequence Diagram (M7-0= AXH)
Command
0
1
2
3
4
5
6
7
E7H
CS#
SCLK
SI(IO0)
SO(IO1)
8
9 10 11 12 13 14 15
4
0
4
0
4
0
4
0
16 17 18 19 20 21 22 23
4
0
4
0
5
1
5
1
5
1
5
1
5
1
5
1
A23-16 A15-8 A7-0
M7-0
6
2
6
2
6
2
6
2
6
2
6
2
7
3
7
3
7
3
7
3
7
3
7
3
WP#(IO2)
HOLD#(IO3)
4
5
6
7
Dummy
Byte1 Byte2
4
0
5
1
6
2
7
3
Byte3
0
1
2
3
4
5
6
7
CS#
SCLK
8
9 10 11 12 13 14 15
SI(IO0)
SO(IO1)
WP#(IO2)
HOLD#(IO3)
4
0
4
0
5
1
5
1
6
2
6
2
7
3
7
3
4
0
4
0
5
1
5
1
6
2
6
2
7
3
7
3
4
0
4
0
5
1
5
1
6
2
6
2
7
3
7
3
4
5
6
7
A23-16 A15-8 A7-0
M7-0 Dummy Byte1 Byte2
4
0
5
1
6
2
7
3
Byte3



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