AT25QL641 datasheet(47/80 Pages) RENESAS

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DS-AT25QL641-130 Rev. G

Page 47

Sep 14, 2022

AT25QL641 Datasheet

8.24 Release Deep Power-Down / Device ID (ABh)

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

the device from the Deep Power-Down state and also obtain the device identification (ID).

The command is issued by driving the CS pin low, sending the command code ABh and driving CS high as

shown in Figure 42 and Figure 43. The Release from Deep Power-Down command requires the time duration of

tRES1 (see Table 26, AC Electrical Characteristics). 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 command.

To obtain the Device ID in SPI mode, the command is initiated by driving the

CS pin low and sending the command 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 44. After CS is

driven high it must keep high for a time duration of tRES2 (See Table 26, AC Electrical Characteristics). The Device

ID can be read continuously. The command is completed by driving CS high.

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

in process (when BUSY equals 1) the command is ignored and does not have any effects on the current cycle.

Figure 42. Release Power-Down Command (SPI Mode)

Figure 43. Release Power-Down Command (QPI Mode)

246

Mode 3

Mode 0

Mode 3

Mode 0

Power-Down Current

Stand-By Current

SCK

Command (ABh)

RES1

SCK

Command

(ABh)

Mode 3

Mode 0

Power-Down Current

Stand-ByCurrent

Mode 3

Mode 0

RES1

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