AT25PE20 datasheet(30/64 Pages) DIALOG

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AT25PE20

DS-25PE20–139C–8/2018

10.2.1 Exit Ultra-Deep Power-Down

To exit from the Ultra-Deep Power-Down mode, the CS pin must simply be pulsed by asserting the CS pin, waiting the

minimum necessary t

CSLU time, and then deasserting the CS pin again. To facilitate simple software development, a

dummy byte opcode can also be entered while the CS pin is being pulsed; the dummy byte opcode is simply ignored by

the device in this case. After the CS pin has been deasserted, the device will exit from the Ultra-Deep Power-Down mode

and return to the standby mode within a maximum time of t

XUDPD. If the CS pin is reasserted before the tXUDPD time has

elapsed in an attempt to start a new operation, then that operation will be ignored and nothing will be performed. The

system must wait for the device to return to the standby mode before normal command operations such as Continuous

Array Read can be resumed.

Since the contents of the Buffer cannot be maintained while in the Ultra-Deep Power-Down mode, the Buffer will contain

undefined data when the device returns to the standby mode.

Figure 10-4. Exit Ultra-Deep Power-Down

ICC

High-impedance

Ultra-Deep Power-Down Mode Current

Active Current

Standby Mode Current

tXUDPD

tCSLU

AT25PE20 Datasheet(PDF) 30 Page - Dialog Semiconductor