Owner manual

AT25DQ321 [DATASHEET]

8718D–DFLASH–12/2012

12.4 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

recognized while in the Deep Power-Down mode.

To resume from the Deep Power-Down mode, the

CS pin must first be asserted and opcode of 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 within the maximum time of t

RDPD

and return to the standby mode. After

the device has returned to the standby mode, normal command operations such as Read Array 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 a byte

boundary (multiples of eight bits), then the device will abort the operation and return to the Deep Power-Down mode.

Figure 12-4. Resume from Deep Power-Down

SCK

MSB

2310

10101011

6754

Opcode

High-impedance

Deep Power-down Mode Current

Active Current

Standby Mode Current

RDPD