Rainbow Electronics AT45DB642 - Manual (Page 32)

32 AT45DB321E [PRELIMINARY DATASHEET]
8784B–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, or if the CS pin is not deasserted on an even
byte boundary (multiples of eight bits), 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
2 3 1 0
1 0 1 0 1 0 1 1
6 7 5 4
Opcode
High-impedance
Deep Power-Down Mode Current
Active Current
Standby Mode Current
t
RDPD