ACE25QC160GLDPTH datasheet(42/73 Pages) ACE

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ACE25QC160G

16M BIT SPI NOR FLASH

VER 1.2

Read Unique ID Number (4Bh)

The Read Unique ID Number instruction accesses a factory-set read-only 64-bit number that is unique to

each ACE25QC160G device. The ID number can be used in conjunction with user software methods to

help prevent copying or cloning of a system. The Read Unique ID instruction is initiated by driving the /CS

pin low and shifting the instruction code “4Bh” followed by a four bytes of dummy clocks. After which, the

64-bit ID is shifted out on the falling edge of SCLK as shown in Figure 24.

Deep Power-Down (B9H)

Although the standby current during normal operation is relatively low, standby current can be further

reduced with the Deep Power-down instruction. The lower power consumption makes the Deep

Power-down (DPD) instruction especially useful for battery powered applications (see ICC1 and ICC2).

The instruction is initiated by driving the /CS pin low and shifting the instruction code “B9h” as shown in

Figure 25.a (SPI mode) &Figure 25.b (QPI mode).

The /CS pin must be driven high after the eighth bit has been latched. If this is not done the Deep Power

down instruction will not be executed. After /CS is driven high, the power-down state will entered within the

time duration of tDP. While in the power-down state only the Release from Deep Power-down / Device ID

instruction, which restores the device to normal operation, will be recognized. All other Instructions are

ignored. This includes the Read Status Register instruction, which is always available during normal

operation. Ignoring all but one instruction also makes the Power Down state a useful condition for securing

maximum write protection. The device always powers-up in the normal operation with the standby current

of ICC1.

Figure22. JEDEC ID Sequence Diagram (SPI Mode only)

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