ACE25QC160GLDPTH datasheet(9/73 Pages) ACE

9 / 73 page

ACE25QC160G

16M BIT SPI NOR FLASH

VER 1.2

Operation Features

Supply Voltage

(A)

Operating Supply Voltage

Prior to selecting the memory and issuing instructions to it, a valid and stable VCC voltage within the

specified [VCC(min), VCC(max)] range must be applied. In order to secure a stable DC supply voltage,

it is recommended to decouple the VCC line with a suitable capacitor (usually of the order of 10nF to

100nF) close to the VCC/VSS package pins. This voltage must remain stable and valid until the end of

the transmission of the instruction and, for a Write instruction, until the completion of the internal write

cycle (tW).

(B)

Power-up Conditions

When the power supply is turned on, VCC rises continuously from VSS to VCC. During this time, the

Chip Select (/CS) line is not allowed to float but should follow the VCC voltage, it is therefore

recommended to connect the /CS line to VCC via a suitable pull-up resistor.

In addition, the Chip Select (/CS) input offers a built-in safety feature, as the /CS input is edge

sensitive as well as level sensitive: after power-up, the device does not become selected until a falling

edge has first been detected on Chip Select (/CS). This ensures that Chip Select (/CS) must have

been High, prior to going Low to start the first operation.

(C)

Device Reset

In order to prevent inadvertent Write operations during power-up (continuous rise of VCC), a power on

reset (POR) circuit is included. At Power-up, the device does not respond to any instruction until VCC

has reached the power on reset threshold voltage.

When VCC has passed the POR threshold, the device is reset.

(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.

ACE25QC160GLDPTH Datasheet(PDF) 9 Page - ACE Technology Co., LTD.