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GD25LQ64CSJS 데이터시트(PDF) 28 Page - GigaDevice Semiconductor (Beijing) Inc.

부품명 GD25LQ64CSJS
상세설명  1.8V Uniform Sector Dual and Quad Serial Flash
PDF  77 Pages
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제조업체  GIGADEVICE [GigaDevice Semiconductor (Beijing) Inc.]
홈페이지  http://www.gigadevice.com/
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1.8V Uniform Sector
Dual and Quad Serial Flash
GD25LQ64C
28
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 (M5-4) = (1, 0), 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 Figure13. If the
“Continuous Read Mode” bits (M5-4) do not equal to (1,
0), 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 (M5-4) before issuing normal command.
Figure13. Quad I/O Word Fast Read Sequence Diagram (M5-4
≠ (1, 0))
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
Figure13a. Quad I/O Word Fast Read Sequence Diagram (M5-4= (1, 0))
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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