SST25VF040B-20-4C-QAE Microchip Technology, SST25VF040B-20-4C-QAE Datasheet - Page 16

• Manufacturer Part Number: SST25VF040B-20-4C-QAE
• Description: Flash 512K X 8 14 us
• Manufacturer: Microchip Technology

Specifications of SST25VF040B-20-4C-QAE

• Product Category: Flash
• Rohs: yes
• Memory Size: 4 Mbit
• Interface Type: SPI
• Access Time: 20 ns
• Operating Temperature: + 70 C
• Mounting Style: SMD/SMT
• Package / Case: WSON-8

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©2011 Silicon Storage Technology, Inc.
32-KByte and 64-KByte Block-Erase
The 32-KByte 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. The 64-KByte Block-Erase instruc-
tion clears all bits in the selected 64 KByte block to FFH. A Block-Erase instruction applied to a protected mem-
ory 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 32-KByte Block-Erase
instruction is initiated by executing an 8-bit command, 52H, followed by address bits [A
bits [A
address bits can be V
Erase instruction is initiated by executing an 8-bit command D8H, followed by address bits [A
[A
driven high before the instruction is executed. The user may poll the Busy bit in the software status register or
wait T
cycles. See Figures 13 and 14 for the 32-KByte Block-Erase and 64-KByte Block-Erase sequences.
Figure 13:32-KByte Block-Erase Sequence
Figure 14:64-KByte Block-Erase Sequence
MS
-A
BE
MS
15
] are used to determine block address (BA
-A
for the completion of the internal self-timed 32-KByte Block-Erase or 64-KByte Block-Erase
15
] (A
MS
= Most Significant Address) are used to determine block address (BA
IL
or V
SCK
CE#
SO
SCK
CE#
SI
IH.
SO
SI
CE# must be driven high before the instruction is executed. The 64-KByte Block-
MODE 3
MODE 0
MODE 3
MODE 0
MSB
0 1 2 3 4 5 6 7 8
MSB
0 1 2 3 4 5 6 7 8
16
52
D8
HIGH IMPEDANCE
X
HIGH IMPEDANCE
), remaining address bits can be V
MSB
ADDR
MSB
ADDR
4 Mbit SPI Serial Flash
15 16
15 16
ADDR
ADDR
23 24
23 24
1295 32KBklEr.0
ADDR
1295 63KBlkEr.0
ADDR
31
SST25VF040B
31
IL
or V
23
S71295-06-000
-A
23
IH.
0
-A
X
]. Address bits
CE# must be
), remaining
Data Sheet
0
]. Address
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