SST25VF080B datasheet(16/36 Pages) MICROCHIP

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S71296-05-000

02/11

8 Mbit SPI Serial Flash

SST25VF080B

Data Sheet

A Microchip Technology Company

4-KByte Sector-Erase

The Sector-Erase instruction clears all bits in the selected 4 KByte sector to FFH. A Sector-Erase

instruction applied to a protected memory area will be ignored. Prior to any Write operation, the Write-

Enable (WREN) instruction must be executed. CE# must remain active low for the duration of any com-

mand sequence. The Sector-Erase instruction is initiated by executing an 8-bit command, 20H, fol-

lowed by address bits [A23-A0]. Address bits [AMS-A12](AMS = Most Significant address) are used to

determine the sector address (SAX), remaining address bits can be VIL or VIH. CE# must be driven high

before the instruction is executed. The user may poll the Busy bit in the software status register or wait

TSE for the completion of the internal self-timed Sector-Erase cycle. See Figure 12 for the Sector-

Erase sequence.

Figure 12:Sector-Erase Sequence

CE#

SCK

ADD.

01 2 3 4 5 6 7 8

ADD.

HIGH IMPEDANCE

15 16

23 24

MODE 0

MODE 3

1296 SecErase.0

MSB

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