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SST26VF040A-80I/SNVXX Datasheet(PDF) 37 Page - Microchip Technology

Part # SST26VF040A-80I/SNVXX
Description  2.5V/3.0V 4-Mbit Serial Quad I/O??(SQI?? Flash Memory
PDF  73 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

SST26VF040A-80I/SNVXX Datasheet(HTML) 37 Page - Microchip Technology

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 2020-2021 Microchip Technology Inc.
DS20006292B-page 37
SST26VF040A
5.33
Lock-Down Protection Settings
(LDPS)
The
Lock-Down
Protection
Settings
instruction
prevents changes to the Block Protection bits (BP0,
BP1, BP2, BP3) of the STATUS register during device
operation. Lock-Down resets after power cycling or
hardware Reset; this allows the Block Protection
settings to be changed. Execute WREN before
initiating
the
Lock-Down
Protection
Settings
instruction. To execute a Lock-Down Protection
Settings command, the host drives CE# low, then
sends the Lock-Down Protection Settings command
cycle (8DH), then drive CE# high. Executing the LDPS
instruction will set the VLP bit in the Configuration
register.
FIGURE 5-38:
LOCK-DOWN PROTECTION SETTINGS (SQI)
FIGURE 5-39:
LOCK-DOWN PROTECTION SETTINGS (SPI)
Note:
C[1:0] = 8DH
MODE 3
0
1
SCK
SIO[3:0]
CE#
C1 C0
MODE 0
MODE 3
0
1
SCK
SIO0
CE#
MODE 0
234567
8D
SIO[3:1]



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