GD25B127DFIS datasheet(19/65 Pages) GIGADEVICE

No. de pieza	GD25B127DFIS

Descripción Electrónicos	3.3V Uniform Sector Dual and Quad Serial Flash

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Fabricante Electrónico	GIGADEVICE [GigaDevice Semiconductor (Beijing) Inc.]

Página de inicio	http://www.gigadevice.com/

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19 / 65 page

3.3V Uniform Sector

Dual and Quad Serial Flash

GD25B127D

19

7.7. Read Data Bytes at Higher Speed (Fast Read) (0BH)

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 is latched-in on the rising edge of SCLK. Then the memory content, at

that address, is shifted out on SO, and each bit is 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.

Figure9. Read Data Bytes at Higher Speed Sequence Diagram

7.8. Dual Output Fast Read (3BH)

The Dual Output Fast Read command is followed by 3-byte address (A23-A0) and a dummy byte, and each bit is

latched in on the rising edge of SCLK, then the memory contents are shifted out 2-bit per clock cycle from SI and SO.

The command sequence is shown in followed Figure 10. 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.

Figure10. Dual Output Fast Read Sequence Diagram

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

3BH

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

5

3

1

7

5

3

1

38 39

Data Out1

32

42 43 44 45

41

46 47

40

7

Data Out2

CS#

SCLK

SI

SO

MSB

Dummy Clocks

4

2

0

6

4

2

0

6

7

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GD25B127DFIS Datasheet(PDF) 19 Page - GigaDevice Semiconductor (Beijing) Inc.

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