AT25QL641 datasheet(41/77 Pages) DIALOG

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AT25QL641

DS-25QL641–130E–10/2018

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 and also 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 7-39 and Figure 7-40. The ‘Release from Deep Power Down’ instruction requires the time duration of t

RES1 (see

Table 8-7, AC Electrical Characteristics

). The CS pin must keep high during the t

RES1 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, the 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 t

RES2 (See Table 8-7, AC Electrical 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 does not have any effects on the current cycle.

Figure 7-39. Release Power Down Instruction (SPI Mode)

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