SST25VF040B-20-4C-QAE Microchip Technology, SST25VF040B-20-4C-QAE Datasheet - Page 8

• 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.
Auto Address Increment (AAI)
Block Protection (BP3,BP2, BP1, BP0)
Block Protection Lock-Down (BPL)
The Auto Address Increment Programming-Status bit provides status on whether the device is in AAI
programming mode or Byte-Program mode. The default at power up is Byte-Program mode.
The Block-Protection (BP3, BP2, BP1, BP0) bits define the size of the memory area, as defined in
Table 4, to be software protected against any memory Write (Program or Erase) operation. The Write-
Status-Register (WRSR) instruction is used to program the BP3, BP2, BP1 and BP0 bits as long as
WP# is high or the Block-Protect-Lock (BPL) bit is 0. Chip-Erase can only be executed if Block-Protec-
tion bits are all 0. After power-up, BP3, BP2, BP1 and BP0 are set to 1.
WP# pin driven low (V
prevents any further alteration of the BPL, BP3, BP2, BP1, and BP0 bits. When the WP# pin is driven
high (V
0.
Table 4: Software Status Register Block Protection
Protection Level
1. X = Don’t Care (RESERVED) default is “0
2. Default at power-up for BP2, BP1, and BP0 is ‘111’. (All Blocks Protected)
None
Upper 1/8
Upper 1/4
Upper 1/2
All Blocks
All Blocks
All Blocks
All Blocks
IH
), the BPL bit has no effect and its value is “Don’t Care”. After power-up, the BPL bit is reset to
IL
), enables the Block-Protection-Lock-Down (BPL) bit. When BPL is set to 1, it
BP3
X
X
X
X
X
X
X
X
8
Status Register Bit
BP2
0
0
0
0
1
1
1
1
BP1
0
0
1
1
0
0
1
1
4 Mbit SPI Serial Flash
FOR
2
SST25VF040B
BP0
0
1
0
1
0
1
0
1
Protected Memory Address
SST25VF040B
70000H-7FFFFH
60000H-7FFFFH
40000H-7FFFFH
00000H-7FFFFH
00000H-7FFFFH
00000H-7FFFFH
00000H-7FFFFH
1
4 Mbit
None
S71295-06-000
Data Sheet
T4.0 1295
02/11