GD25LE256DFJS datasheet(26/83 Pages) GIGADEVICE

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1.8V Uniform Sector

Dual and Quad Serial Flash

GD25LE256D

7.9.

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) or a 4-byte address (A31-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. The default read mode is 3-byte address mode, and the lower 128Mbit

can be read with a single Read Data Byte at Higher Speed (0BH) command. By entering 4-byte address mode, or to set

EN4B (S11) bit to 1, the higher 128Mbit can be read with a single Read Data Byte at Higher Speed (0BH) command.

Figure10. Read Data Bytes at Higher Speed Sequence Diagram

Command

0BH

CS#

SCLK

High-Z

9 10

28 29 30 31

23 22 21

24-bit address

MSB

34 35 36 37

38 39

Data Out1

42 43 44 45

46 47

Data Out2

CS#

SCLK

MSB

Dummy Byte

Note: The device default is in 24-bit address mode. For 4-byte mode, the address length becomes 32-bit.

GD25LE256DFJS データシート(PDF) 26 Page - GigaDevice Semiconductor (Beijing) Inc.