SST25VF040B-50-4C-ZAE Microchip Technology, SST25VF040B-50-4C-ZAE Datasheet - Page 6
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SST25VF040B-50-4C-ZAE
Manufacturer Part Number
SST25VF040B-50-4C-ZAE
Description
2.7V To 3.6V 4Mbit SPI Serial Flash 8 CSP T/R
Manufacturer
Microchip Technology
Specifications of SST25VF040B-50-4C-ZAE
Format - Memory
FLASH
Memory Type
FLASH
Memory Size
4M (512K x 8)
Speed
50MHz
Interface
SPI Serial
Voltage - Supply
2.7 V ~ 3.6 V
Operating Temperature
0°C ~ 70°C
Package / Case
8-CSP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
SST25VF040B-50-4C-ZAE
Manufacturer:
SST
Quantity:
20 000
A Microchip Technology Company
©2011 Silicon Storage Technology, Inc.
Write Protection
Write Protect Pin (WP#)
Figure 4: Hold Condition Waveform
SST25VF040B provides software Write protection. The Write Protect pin (WP#) enables or disables
the lock-down function of the status register. The Block-Protection bits (BP3, BP2, BP1, BP0, and BPL)
in the status register provide Write protection to the memory array and the status register. See Table 4
for the Block-Protection description.
The Write Protect (WP#) pin enables the lock-down function of the BPL bit (bit 7) in the status register.
When WP# is driven low, the execution of the Write-Status-Register (WRSR) instruction is determined
by the value of the BPL bit (see Table 2). When WP# is high, the lock-down function of the BPL bit is
disabled.
Table 2: Conditions to execute Write-Status-Register (WRSR) Instruction
HOLD#
SCK
WP#
H
L
L
Active
BPL
X
1
0
6
Hold
Execute WRSR Instruction
Not Allowed
Allowed
Allowed
4 Mbit SPI Serial Flash
Active
Hold
SST25VF040B
S71295-06-000
Active
1295 HoldCond.0
Data Sheet
T2.0 1295
02/11