IS25LP064A-RBLA2 datasheet(55/99 Pages) ISSI

55 / 99 page

IS25LP064A/032A

Integrated Silicon Solution, Inc.- www.issi.com

Rev. A

11/06/2015

8.22 ENTER DEEP POWER DOWN (DP, B9h)

The Enter Deep Power-down (DP) instruction is for setting the device on the minimizing the power consumption

(enter into Power-down mode). During this mode, standby current is reduced from Isb1 to Isb2. While in the

Power-down mode, the device is not active and all Write/Program/Erase instructions are ignored. The instruction

is initiated by driving the CE# pin low and shifting the instruction code into the device. The CE# pin must be

driven high after the instruction has been latched, or Power-down mode will not engage. Once CE# pin driven

high, the Power-down mode will be entered within the time duration of tDP. While in the Power-down mode only

the Release from Power-down/RDID 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. Ignoring all but one instruction makes the Power Down state a useful

condition for securing maximum write protection. It is available in both SPI and QPI mode.

Figure 8.36 Enter Deep Power Down Mode Sequence

Instruction = B9h

CE #

SCK

Mode 3

Mode 0

tDP

High Impedance

Figure 8.37 Enter Deep Power Down Mode QPI Sequence

B9h

CE#

SCK

IO[3:0]

Mode 3

Mode 0

tDP

IS25LP064A-RBLA2 数据表(PDF) 55 Page - Integrated Silicon Solution, Inc