SST25VF040-20-4C-QAE SST [Silicon Storage Technology, Inc], SST25VF040-20-4C-QAE Datasheet - Page 11

• Manufacturer Part Number: SST25VF040-20-4C-QAE
• Description: 4 Mbit SPI Serial Flash
• Manufacturer: SST [Silicon Storage Technology, Inc]

4 Mbit SPI Serial Flash
SST25VF040
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 [A
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, followed by
©2006 Silicon Storage Technology, Inc.
FIGURE 8: Sector-Erase Sequence
FIGURE 9: Block-Erase Sequence
23
-A
0
]. Address bits [A
SCK
SCK
CE#
CE#
SO
SO
SI
SI
MODE 3
MODE 0
MODE 3
MODE 0
MSB
MSB
0 1 2 3 4 5 6 7 8
0 1 2 3 4 5 6 7 8
MS
52
20
-A
HIGH IMPEDANCE
12
HIGH IMPEDANCE
]
11
MSB
MSB
(A
sector address (SA
V
cuted. The user may poll the Busy bit in the software status
register or wait T
timed Sector-Erase cycle. See Figure 8 for the Sector-
Erase sequence.
address bits [A
significant address) are used to determine block address
(BA
be driven high before the instruction is executed. The user
may poll the Busy bit in the software status register or wait
T
Erase cycle. See Figure 9 for the Block-Erase sequence.
BE
ADD.
IH.
ADD.
MS
X
CE# must be driven high before the instruction is exe-
), remaining address bits can be V
for the completion of the internal self-timed Block-
= Most Significant address) are used to determine the
15 16
15 16
ADD.
ADD.
23 24
23 24
23
-A
SE
ADD.
ADD.
X
0
]. Address bits [A
), remaining address bits can be V
for the completion of the internal self-
1231 F08.1
1231 F07.1
31
31
EOL Product Data Sheet
MS
IL
S71231(04)-01-EOL
-A
or V
15
] (A
IH
. CE# must
MS
= Most
IL
09/10
or