SST25WF080B datasheet(22/39 Pages) MICROCHIP

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SST25WF080B

DS20005164C-page 22

 2014 Microchip Technology Inc.

6.2

Hardware Data Protection

SST25WF080B provides a power-up reset function. To

ensure that the power reset circuit will operate cor-

rectly, the device must meet the conditions shown in

Figure 6-2 and Table 6-4. Microchip does not guaran-

tee the data in the event of an instantaneous power fail-

ure that occurs during a Write operation.

FIGURE 6-2:

POWER-DOWN TIMING DIAGRAM

6.3

Software Data Protection

SST25WF080B prevents unintentional operations by

not recognizing commands under the following condi-

tions:

• After inputting a Write command, if the rising CE#

edge timing is not in a bus cycle (8 CLK units of

SCK)

• When the Page-Program data is not in 1-byte

increments

• If the Write Status Register instruction is input for

two bus cycles or more.

6.4

Decoupling Capacitor

A 0.1μF ceramic capacitor must be provided to each

device and connected between VDD and VSS to ensure

that the device will operate correctly.

TABLE 6-4:

RECOMMENDED SYSTEM POWER-DOWN TIMINGS

Symbol

Parameter

Min

Max

Units

TPD

Power-down time

VBOT

Power-down voltage

0.2

TPD

VDD Min

VDD Max

VDD

25164 F48.0

VBOT

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