SST25VF032B datasheet(15/31 Pages) MICROCHIP

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S71327-04-000

02/11

32 Mbit SPI Serial Flash

SST25VF032B

Data Sheet

A Microchip Technology Company

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. 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

1327 F13.0

CE#

SCK

ADD.

012

ADD.

HIGH IMPEDANCE

15 16

23 24

ADD.

MODE 3

MODE 0

SST25VF032B Datasheet(PDF) 15 Page - Microchip Technology