AT25QL321 datasheet(38/79 Pages) DIALOG

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AT25QL321

DS-25QL321–131C–5/2017

Figure 7-37. Deep Power Down Instruction (SPI Mode)

Figure 7-38. Deep Power Down Instruction (QPI Mode)

7.24 Release Deep Power Down / Device ID (ABh)

The Release Deep Power Down / Device ID instruction is a multi-purpose instruction. It can be used to release the

device from the Deep Power Down state or obtain the device identification (ID).

The instruction is issued by driving the CS pin low, sending the instruction code “ABh” and driving CS high as shown in

figure Figure 7-39 and Figure 7-40. Release from Deep Power Down require the time duration of tRES1 (See AC

Characteristics) for re-work a normal operation and accepting other instructions. The CS pin must keep high during the

tRES1 time duration.

The Device ID can be read during SPI mode only.

In other words, Device ID feature is not available in QPI mode for Release

Deep Power Down/Device ID instruction.

To obtain the Device ID in SPI mode, instruction is initiated by driving the CS pin

low and sending the instruction code “ABh” with following 3‐dummy bytes. The Device ID bits are then shifted on the

falling edge of SCK with most significant bit (MSB) first as shown in Figure 7-41. After CS is driven high it must keep

high for a time duration of tRES2 (See AC Characteristics). The Device ID can be read continuously. The instruction is

completed by driving CS high.

If the Release from Deep Power Down /Device ID instruction is issued while an Erase, Program or Write cycle is in process

(when BUSY equals 1) the instruction is ignored and will not have any effects on the current cycle.

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