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GD25B257D Datasheet(PDF) 28 Page - GigaDevice Semiconductor (Beijing) Inc.

Part # GD25B257D
Description  3.3V Uniform Sector Dual and Quad Serial Flash
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Manufacturer  GIGADEVICE [GigaDevice Semiconductor (Beijing) Inc.]
Direct Link  http://www.gigadevice.com/
Logo GIGADEVICE - GigaDevice Semiconductor (Beijing) Inc.

GD25B257D Datasheet(HTML) 28 Page - GigaDevice Semiconductor (Beijing) Inc.

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3.3V Uniform Sector
Dual and Quad Serial Flash
GD25B257D
28
8.9. Read Data Bytes at Higher Speed (Fast Read 0BH or 4Fast Read 0CH)
The Read Data Bytes at Higher Speed (Fast Read) command is for quickly reading data out. It is followed by a 3-Byte
address (A23-A0) and a dummy Byte, and each bit being latched-in on the rising edge of SCLK. Then the memory content,
at that address, is shifted out on SO, and each bit being shifted out, at a Max frequency fC, on the falling edge of SCLK. 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.
Figure 13. Read Data Bytes at Higher Speed Sequence Diagram (ADS=0)
Figure 14. Read Data Bytes at Higher Speed Sequence Diagram (ADS=1)
Command
0
1
2
3
4
5
6
7
0BH
CS#
SCLK
SI
SO
High-Z
8
9 10
28 29 30 31
3
2
1
0
23 22 21
24-bit address
MSB
34 35 36 37
33
6
5
4
3
2
1
0
38 39
Data Out1
32
42 43 44 45
41
46 47
40
7
6
5
4
3
2
1
0
7
6
5
7
Data Out2
CS#
SCLK
SI
SO
MSB
Dummy Byte
Command
0
1
2
3
4
5
6
7
0BH
CS#
SCLK
SI
SO
High-Z
8
9 10
36 37 38 39
3
2
1
0
31 30 29
32-bit address
MSB
42 43 44 45
41
6
5
4
3
2
1
0
46 47
Data Out1
40
50 51 52 53
49
54 55
48
7
6
5
4
3
2
1
0
7
6
5
7
Data Out2
CS#
SCLK
SI
SO
MSB
Dummy Byte


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