GD25VQ16CSFG datasheet(36/59 Pages) GIGADEVICE

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Uniform Sector

Dual and Quad Serial Flash

GD25VQ16C

7.30.

Read Security Registers (48H)

The Read Security Registers command is similar to Fast Read command. The command is followed by a 3-byte

address (A23-A0) and a dummy byte, each bit being latched-in during the rising edge of SCLK. Then the memory content,

at that address, is shifted out on SO, each bit being shifted out, at a Max frequency fC, during 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. Once the A7-A0 address reaches the last byte of the register (Byte FFH), it will reset to 00H, the

command is completed by driving CS# high.

Address

A23-A16

A15-A8

A7-A0

Security Registers 0

00H

Byte Address

Security Registers 1

00H

01H

Byte Address

Security Registers 2

00H

02H

Byte Address

Security Registers 3

00H

03H

Byte Address

Figure 35. Read Security Registers command Sequence Diagram

Command

48H

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

GD25VQ16CSFG Datasheet(PDF) 36 Page - GigaDevice Semiconductor (Beijing) Inc.

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