1 Mbit SPI Serial Flash
SST25VF010A
Data Sheet
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
the any command sequence. The Sector-Erase instruction
is initiated by executing an 8-bit command, 20H, followed
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 exe-
cuted. 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 8 for the Sector-
Erase sequence.
CE#
MODE 3
0
1
2
3
4
5
6
7
8
15 16
23
31
24
MODE 0
SCK
20
ADD.
MSB
ADD.
ADD.
SI
MSB
HIGH IMPEDANCE
SO
1265 F08.0
FIGURE 8: SECTOR-ERASE SEQUENCE
Block-Erase
The Block-Erase instruction clears all bits in the selected 32
KByte block to FFH. A Block-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 command sequence. The Block-Erase instruction is
initiated by executing an 8-bit command, 52H or D8H, fol-
lowed by address bits [A23-A0]. Address bits [AMS-A15]
(AMS = Most significant address) are used to determine
block address (BAX), remaining address bits can be VIL or
VIH. CE# must be driven high before the instruction is exe-
cuted. The user may poll the Busy bit in the software status
register or wait TBE for the completion of the internal self-
timed Block-Erase cycle. See Figure 9 for the Block-Erase
sequence.
CE#
MODE 3
0
1
2
3
4
5
6
7
8
15 16
23
31
24
MODE 0
SCK
52 or D8
ADD.
MSB
ADD.
ADD.
SI
MSB
HIGH IMPEDANCE
SO
1265 F09.0
FIGURE 9: BLOCK-ERASE SEQUENCE
©2006 Silicon Storage Technology, Inc.
S71265-02-000
1/06
13
SST [ SILICON STORAGE TECHNOLOGY, INC ]
