ATXP032 datasheet(78/113 Pages) DIALOG

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ATXP032

DS-ATXP032–114I–4-2020

Figure 13-1. Read Manufacturer and Device ID

13.2

Deep Power-Down (B9h)

During normal operation, the device is placed in the standby mode to consume less power as long as the CS pin

remains deasserted and no internal operation is in progress. The Deep Power-Down command offers the ability to

place the device into an even lower power consumption state called the deep power-down mode.

When the device is in the deep power-down mode, all commands are ignored with the exception of the Read

Status Register Byte 1 (05h) command and the Resume from Deep Power-Down (ABh) command. Since all write

commands are ignored, the mode can be used as an extra protection mechanism against program and erase

operations.

Entering the deep power-down mode is accomplished by simply asserting the CS pin, clocking in the command of

B9h, and then deasserting the CS pin. Any additional data clocked into the device after the command is ignored.

When the CS pin is deasserted, the device enters the deep power-down mode within the maximum time of t

EDPD.

The complete command must be clocked in before the CS pin is deasserted, and the CS pin must be deasserted

on a whole byte boundary (multiples of eight bits); otherwise, the device aborts the operation and returns to the

standby mode once the CS pin is deasserted. In addition, the device defaults to the standby mode after a power-

cycle.

The Deep Power-Down command is ignored if an internally self-timed operation such as a program or erase cycle

is in progress. The Deep Power-Down command must be reissued after the internally self-timed operation has

been completed in order for the device to enter the deep power-down mode.

SCK

9Fh

103

43h

A7h

00h

01h

00h

102

Opcode

Manufacturer ID

Note: Each Transition

shown for SI and SO represents one byte (8 bits)

High-Impedance

Device ID

Byte 1

Device ID

Byte 2

Extended Device

Information

String Length

7Fh

Continuation Code

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