20

AT45DB321D [DATASHEET]

3597T–DFLASH–11/2013

10.

Deep Power-down

After an initial power-up, the device will default to standby mode. The deep power-down command allows the device to enter

into the lowest power-consumption mode. To enter the deep power-down mode, the CS pin must first be asserted. Once the CS

pin has been asserted, an opcode of B9H must be clocked in via the input pin (SI). After the last bit of the command has been

clocked in, the CS pin must be deasserted to initiate deep power-down operation. After the CS pin is deasserted, the device will

instructions are ignored, except for the resume from deep power-down commands.

Table 10-1. Deep Power-down

Command

Opcode

Figure 10-1. Deep Power-down

10.1

Resume from Deep Power-down

The resume from deep power-down command takes the device out of the deep power-down mode and returns it to the normal

standby mode. To resume from deep power-down mode, the CS pin must first be asserted, and an opcode of ABH must be

clocked in via the input pin (SI). After the last bit of the command has been clocked in, the CS pin must be deasserted to

terminate the deep power-down mode. After the CS pin is deasserted, the device will return to the normal standby mode within

After resuming from deep power-down, the device will return to the normal standby mode.

Table 10-2. Resume from Deep Power-down

Command

Opcode

Figure 10-2. Resume from Deep Power-Down

Deep power-down

B9H

Opcode

CS

Each transition

represents 8 bits

SI

Resume from deep power-down

ABH

Opcode

CS

Each transition

represents 8 bits

SI