ACE25QA100G

1M BIT SPI NOR FLASH

VER 1.2

5

(D)

Power-down

At Power-down (continuous decrease in VCC), as soon as VCC drops from the normal operating

voltage to below the power on reset threshold voltage, the device stops responding to any instruction

sent to it. During Power-down, the device must be deselected (Chip Select (/CS) should be allowed to

follow the voltage applied on VCC) and in Standby Power mode (that is there should be no internal

Write cycle in progress).

Active Power and Standby Power Modes

When Chip Select (/CS) is Low, the device is selected, and in the Active Power mode. The device

consumes ICC.

When Chip Select (/CS) is High, the device is deselected. If a Write cycle is not currently in progress, the

device then goes in to the Standby Power mode, and the device consumption drops to ICC1.

Status Register

Table 3. Status Register

S7

S6

S5

S4

S3

S2

S1

S0

SRP

Reserved

Reserved

BP2

BP1

BP0

WEL

WIP

The status and control bits of the Status Register are as follows:

WIP bit

The Write in Progress (WIP) bit indicates whether the memory is busy in program/erase/write status

register progress. When WIP bit sets to 1, means the device is busy in program/erase/write status register

progress, when WIP bit sets 0, means the device is not in program/erase/write status register progress.

WEL bit

The Write Enable Latch bit indicates the status of the internal Write Enable Latch. When set to 1 the

internal Write Enable Latch is set, when set to 0 the internal Write Enable Latch is reset and no Write Status

Register, Program or Erase instruction is accepted.

BP2, BP1, BP0 bits

The Block Protect (BP2, BP1, and BP0) bits are non-volatile. They define the size of the area to be

software protected against Program and Erase instructions. These bits are written with the Write Status

Register instruction. When the Block Protect (BP2, BP1, and BP0) bits are set to 1, the relevant memory

area. Becomes protected against Page Program, Sector Erase and Block Erase instructions. The Block

Protect (BP2, BP1, and BP0) bits can be written provided that the Hardware Protected mode has not been

set.