AT25SF321B datasheet(48/61 Pages) DIALOG

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AT25SF321B

DS-AT25SF321B–179E–06-2020

12.6 Resume from Deep Power-Down (ABh)

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

recognizes while in the Deep Power-Down mode.

To resume from the Deep Power-Down mode, the CS pin must be asserted first, and the opcode of ABh must be

clocked into the device. Any additional data clocked into the device after the opcode is ignored. When the CS pin is

deasserted, the device exits the Deep Power-Down mode and returns 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 an

byte boundary (multiples of eight bits), the device aborts the operation and returns to the Deep Power-Down mode.

Figure 12-6. Resume from Deep Power-Down

SCK

MSB

ICC

10101011

OPCODE

HIGH-IMPEDANCE

Deep Power-Down Mode Current

Active Current

Standby Mode Current

tRDPD

AT25SF321B Datasheet(PDF) 48 Page - Dialog Semiconductor