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AT25QL321

DS-25QL321–131C–5/2017

Resume instruction cannot be accepted if the previous Erase/Program Suspend operation was interrupted by

unexpected power off. It is also required that a subsequent Erase/Program Suspend instruction not to be issued within a

minimum of time of “tSUS” following a previous Resume instruction. (Please refer to Figure 7-35 and Figure 7-36).

Figure 7-35. Erase / Program Resume instruction (SPI Mode)

Figure 7-36. Erase / Program Resume instruction (QPI Mode)

7.23 Deep Power Down (B9h)

Executing the Deep Power Down instruction is the best way to put the device in the lowest power consumption. The

Deep Power Down instruction reduces the standby current (from ICC1 to ICC2, as specified in AC characteristics). The

instruction is entered by driving the CS pin low with following the instruction code “B9h”. (Please refer to Figure 7-37 and

Figure 7-38).

The CS pin must go high exactly at the byte boundary (the latest eighth bit of instruction code been latched‐in);

otherwise, the Deep Power Down instruction is not executed. After CS goes high, it requires a delay of tDP and the Deep

Power Down mode is entered. While in the Release Deep Power Down / Device ID instruction, which restores the device

to normal operation, will be recognized. All other instructions are ignored including the Read Status Register instruction,

which is always available during normal operation. Deep Power Down Mode automatically stops at Power-Down, and the

device always Power‐up in the Standby Mode.

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