Datasheet

©2011 Silicon Storage Technology, Inc. DS25071A 12/11
15
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 [A
23
-A
0
]. Address bits [A
MS
-A
12
](A
MS
= Most Significant address) are used to
determine the sector address (SA
X
), remaining address bits can be V
IL
or V
IH.
CE# must be driven high
before the instruction is executed. Poll the Busy bit in the software status register or wait T
SE
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#
SO
SI
SCK
ADD.
012345678
ADD.20
HIGH IMPEDANCE
15 16 23 24 31
ADD.
MODE 3
MODE 0