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GD25B127D Datasheet(Scheda tecnica) 30 Page - GigaDevice Semiconductor (Beijing) Inc.

Numero della parte GD25B127D
Dettagli  3.3V Uniform Sector Dual and Quad Serial Flash
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Produttore  GIGADEVICE [GigaDevice Semiconductor (Beijing) Inc.]
Homepage  http://www.gigadevice.com/
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3.3V Uniform Sector
Dual and Quad Serial Flash
GD25B127D
30
7.20.
Deep Power-Down (DP) (B9H)
Executing the Deep Power-Down (DP) command is the only way to put the device in the lowest consumption mode
(the Deep Power-Down Mode). It can also be used as an extra software protection mechanism, while the device is not in
active use, since in this mode, the device ignores all Write, Program and Erase commands. Driving CS# high deselects the
device, and puts the device in the Standby Mode (if there is no internal cycle currently in progress). But this mode is not the
Deep Power-Down Mode. The Deep Power-Down Mode can only be entered by executing the Deep Power-Down (DP)
command. Once the device has entered the Deep Power-Down Mode, all commands are ignored except the Release from
Deep Power-Down and Read Device ID (RDI) command or software reset command. The Release from Deep Power-Down
and Read Device ID (RDI) command releases the device from Deep Power-Down mode, also allows the Device ID of the
device to be output on SO.
The Deep Power-Down Mode automatically stops at Power-Down, and the device is in the Standby Mode after Power-
Up.
The Deep Power-Down command sequence: CS# goes low  sending Deep Power-Down command  CS# goes
high. The command sequence is shown in Figure22. CS# must be driven high after the eighth bit of the command code has
been latched in; otherwise the Deep Power-Down (DP) command is not executed. As soon as CS# is driven high, it requires
a delay of tDP before the supply current is reduced to ICC2 and the Deep Power-Down Mode is entered. Any Deep Power-
Down (DP) command, while an Erase, Program or Write cycle is in progress, is rejected without having any effects on the
cycle that is in progress.
Figure22. Deep Power-Down Sequence Diagram
Command
0
1
2
3
4
5
6
7
B9H
CS#
SCLK
SI
tDP
Stand-by mode Deep Power-down mode




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