GD25LE40C datasheet(35/75 Pages) GIGADEVICE

35 / 75 page

1.8V Uniform Sector

Dual and Quad Serial Flash

GD25LE40C/20C/10C/05C

Figure21. Deep Power-Down Sequence Diagram

7.21 Release from Deep Power-Down and Read Device ID (RDI) (ABH)

The Release from Power-Down and Read Device ID command is a multi-purpose command. It can be used to release the

device from the Power-Down state or obtain the devices electronic identification (ID) number.

To release the device from the Power-Down state, the command is issued by driving the CS# pin low, shifting the

instruction code

“ABH” and driving CS# high as shown in Figure22. Release from Power-Down will take the time duration

of tRES1 (See AC Characteristics) before the device will resume normal operation and other c omma nd are accepted. The

CS# pin must remain high during the tRES1 time duration.

When used only to obtain the Device ID while not in the Power-Down state, the command is initiated by driving the CS#

pin low and shifting the instruction code

“ABH” followed by 3-dummy byte. The Device ID bits are then shifted out on the

falling edge of SCLK with most significant bit (MSB) first as shown in Figure23. The Device ID value is listed in

Manufacturer and Device Identification table. The Device ID can be read continuously. The command is completed by

driving CS# high.

When used to release the device from the Power-Down state and obtain the Device ID, the command is the same as

previously described, and shown in Figure23, except that after CS# is driven high it must remain high for a time duration

of tRES2 (See AC Characteristics). After this time duration the device will resume normal operation and other command will

be accepted. If the Release from Power-Down / Device ID command is issued while an Erase, Program or Write cycle is

in process (when WIP equal 1) the command is ignored and will not have any effects on the current cycle.

Figure22. Release Power-Down Sequence Diagram

Figure23. Release Power-Down/Read Device ID Sequence Diagram

Command

B9H

CS#

SCLK

tDP

Stand-by mode Deep Power-down mode

Command

ABH

CS#

SCLK

RES1

Stand-by mode

Deep Power-down mode

Command

ABH

CS#

SCLK

29 30 31

MSB

3 Dummy Bytes

23 22

32 33 34 35 36 37 38

MSB

t RES2

Stand-by Mode

Deep Power-down Mode

High-Z

Device ID

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