Owner manual

30
AT45DB021E [PRELIMINARY DATASHEET]
8789B–DFLASH–11/2012
10.1 Resume from Deep Power-Down
In order to exit the Deep Power-Down mode and resume normal device operation, the Resume from Deep Power-Down
command must be issued. The Resume from Deep Power-Down command is the only command that the device will
recognize while in the Deep Power-Down mode.
To resume from the Deep Power-Down mode, the
CS pin must first be asserted and then the opcode ABh must be
clocked into the device. Any additional data clocked into the device after the opcode will be ignored. When the
CS pin is
deasserted, the device will exit the Deep Power-Down mode and return to the standby mode within the maximum time of
t
RDPD
. After the device has returned to the standby mode, normal command operations such as Continuous Array Read
can be resumed.
If the complete opcode is not clocked in before the
CS pin is deasserted, then the device will abort the operation and
return to the Deep Power-Down mode.
Figure 10-2. Resume from Deep Power-Down
SCK
CS
SI
SO
MSB
I
CC
2310
10101011
6754
Opcode
High-impedance
Deep Power-Down Mode Current
Active Current
Standby Mode Current
t
RDPD