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GD25Q41ASIGT Datasheet(PDF) 23 Page - GigaDevice Semiconductor (Beijing) Inc.

Part # GD25Q41ASIGT
Description  Uniform Sector Dual and Quad Serial Flash
PDF  51 Pages
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Manufacturer  GIGADEVICE [GigaDevice Semiconductor (Beijing) Inc.]
Direct Link  http://www.gigadevice.com/
Logo GIGADEVICE - GigaDevice Semiconductor (Beijing) Inc.

GD25Q41ASIGT Datasheet(HTML) 23 Page - GigaDevice Semiconductor (Beijing) Inc.

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Uniform Sector
Dual and Quad Serial Flash
GD25Q21B
23
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 Fast read command. To ensure optimum performance
the High Performance Mode (HPM) command (A3H) must be executed once, prior to the Quad I/O Fast Read command.
Quad I/O Fast Read with
“Continuous Read Mode”
The Quad I/O 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 Fast Read command (after CS# is raised and then lowered) does not require the EBH command code. The
command sequence is shown in followed Figure15. If the
“Continuous Read Mode” bits (M7-0) are any value other than
AXH, the next command requires the first EBH 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 14. Quad I/O Fast Read Sequence Diagram (M7-0= 0XH or not AXH)
Figure 15. Quad I/O Fast Read Sequence Diagram (M7-0= AXH)
Quad I/O Fast Read with “8/16/32/64-Byte Wrap Around” in Standard SPI mode
The Quad I/O Fast Read command can be used to access a specific portion within a page by issuing “Set Burst with
Wrap” (77H) commands prior to EBH. The “Set Burst with Wrap” (77H) command can either enable or disable the “Wrap
Around” feature for the following EBH commands. When “Wrap Around” is enabled, the data being accessed can be limited
to either an 8/16/32/64-byte section of a 256-byte page. The output data starts at the initial address specified in the
command, once it reaches the ending boundary of the 8/16/32/64-byte section, the output will wrap around the beginning
Command
0
1
2
3
4
5
6
7
EBH
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
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



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