SST25VF040B-50-4I-QAF Microchip Technology, SST25VF040B-50-4I-QAF Datasheet - Page 18
![IC FLASH SER 4MB 50MHZ SPI 8WSON](/photos/16/11/161176/sst25vf040b_sml.jpg)
SST25VF040B-50-4I-QAF
Manufacturer Part Number
SST25VF040B-50-4I-QAF
Description
IC FLASH SER 4MB 50MHZ SPI 8WSON
Manufacturer
Microchip Technology
Datasheets
1.SST25VF512A-33-4C-SAE.pdf
(2 pages)
2.SST25VF040B-80-4I-SAE.pdf
(33 pages)
3.SST25VF040B-80-4I-QAE.pdf
(33 pages)
Specifications of SST25VF040B-50-4I-QAF
Memory Type
FLASH
Memory Size
4M (512K x 8)
Operating Temperature
-40°C ~ 85°C
Package / Case
8-WSON
Format - Memory
FLASH
Speed
50MHz
Interface
SPI Serial
Voltage - Supply
2.7 V ~ 3.6 V
Architecture
Sectored
Interface Type
SPI
Access Time
50 ns
Supply Voltage (max)
3.6 V
Supply Voltage (min)
2.7 V
Maximum Operating Current
15 mA
Mounting Style
SMD/SMT
Organization
32 KB
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Lead Free Status / RoHS Status
Lead free / RoHS Compliant, Lead free / RoHS Compliant
A Microchip Technology Company
©2011 Silicon Storage Technology, Inc.
Write-Enable (WREN)
Write-Disable (WRDI)
The Write-Enable (WREN) instruction sets the Write-Enable-Latch bit in the Status Register to 1 allow-
ing Write operations to occur. The WREN instruction must be executed prior to any Write (Program/
Erase) operation. The WREN instruction may also be used to allow execution of the Write-Status-Reg-
ister (WRSR) instruction; however, the Write-Enable-Latch bit in the Status Register will be cleared
upon the rising edge CE# of the WRSR instruction. CE# must be driven high before the WREN instruc-
tion is executed.
Figure 17:Write Enable (WREN) Sequence
The Write-Disable (WRDI) instruction resets the Write-Enable-Latch bit and AAI bit to 0 disabling any
new Write operations from occurring. The WRDI instruction will not terminate any programming opera-
tion in progress. Any program operation in progress may continue up to T
instruction. CE# must be driven high before the WRDI instruction is executed.
Figure 18:Write Disable (WRDI) Sequence
SCK
CE#
SCK
CE#
SO
SO
SI
SI
MODE 3
MODE 0
MODE 3
MODE 0
18
HIGH IMPEDANCE
HIGH IMPEDANCE
MSB
0 1 2 3 4 5 6 7
MSB
0 1 2 3 4 5 6 7
04
06
1295 WREN.0
1295 WRDI.0
4 Mbit SPI Serial Flash
BP
after executing the WRDI
SST25VF040B
S71295-06-000
Data Sheet
02/11