GD25LE16CSIG datasheet(32/67 Pages) GIGADEVICE

32 / 67 page

1.8V Uniform Sector

Dual and Quad Serial Flash

GD25LE16C

by the 24-bit device identification, stored in the memory. Each bit is shifted out on the falling edge of Serial Clock. The

command sequence is shown in Figure 27. The Read Identification (RDID) command is terminated by driving CS# high at

any time during data output. When CS# is driven high, the device is in the Standby Mode. Once in the Standby Mode, the

device waits to be selected, so that it can receive, decode and execute commands.

Figure27. Read Identification ID Sequence Diagram

7.26 Read Unique ID (4BH)

The Read Unique ID command accesses a factory-set read-only 128bit number that is unique to each device. The Unique

ID can be used in conjunction with user software methods to help prevent copying or cloning of a system.

The Read Unique ID command sequence: CS# goes low  sending Read Unique ID command  3-Byte Address

(000000H) Dummy Byte128bit Unique ID Out CS# goes high.

Figure28. Read Unique ID Sequence Diagram

CS#

SCLK

9 10

MSB

18 19 20 21

22 23

26 27 28 29

30 31

Capacity ID7-ID0

CS#

SCLK

MSB

Memory Type ID15-ID8

11 12 13 14 15

9FH

Manufacturer ID

MSB

Command

4BH

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

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