ATXP032 datasheet(82/113 Pages) DIALOG

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ATXP032

DS-ATXP032–114I–4-2020

Figure 13-7. Resume from Deep Power-Down in Octal Mode — DDR

13.5

Ultra-Deep Power-Down (79h)

The ultra-deep power-down mode allows the device to further reduce its energy consumption compared to the

existing standby and deep power-down modes by shutting down additional internal circuitry. When the device is in

the ultra-deep power-down mode, the Read Status Register Byte 1 (05h) command is the only command that the

device recognizes. When reading the Status/Control registers in this mode, all bits are read as “1”, indicating that

the device is in UDPD mode. All other commands, including the Resume from Deep Power-Down or Ultra-Deep

Power-Down (ABh) commands, are ignored.

Since all write commands are ignored, the mode can be used as an extra protection mechanism against

inadvertent or unintentional program and erase operations. Entering the ultra-deep power-down mode is

accomplished by simply asserting the CS pin, clocking in the command 79h, 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 ultra-deep power-down mode within the maximum time of t

EUDPD.

The complete command must be clocked in before the CS pin is deasserted; 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 Ultra-Deep Power-Down command is ignored if an internally self-timed

operation such as a program or erase cycle is in progress.

All input pins have to be at valid CMOS levels to minimize power consumption in ultra-deep power-down mode.

Upon recovery from ultra-deep power-down mode, all internal registers except the EPE bit in Status/Control

values EPE may have upon recovery from ultra-deep power-down.

The device wakes up in SPI mode even if it was in octal mode when it entered the ultra-deep power-down state.

RDPD

ICC

Deep Power Mode Current

Standby Mode Current

Active Current

ABh

Opcode

I/O7-0

SCK

ATXP032 Datasheet(PDF) 82 Page - Dialog Semiconductor