参数资料
型号: SST25VF020B-80-4I-QAE
厂商: Microchip Technology
文件页数: 21/35页
文件大小: 0K
描述: IC FLASH SER 2MB 80MHZ SPI 8WSON
标准包装: 98
系列: SST25
格式 - 存储器: 闪存
存储器类型: FLASH
存储容量: 2M (256K x 8)
速度: 80MHz
接口: SPI 串行
电源电压: 2.7 V ~ 3.6 V
工作温度: -40°C ~ 85°C
封装/外壳: 8-WDFN 裸露焊盘
供应商设备封装: 8-WSON
包装: 管件
2 Mbit SPI Serial Flash
A Microchip Technology Company
SST25VF020B
Data Sheet
Write-Disable (WRDI)
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 BP after executing the WRDI
instruction. CE# must be driven high before the WRDI instruction is executed.
CE#
MODE 3
0 1 2 3 4 5 6 7
SCK
SI
SO
MODE 0
04
MSB
HIGH IMPEDANCE
1417 WRDI.0
Figure 19: Write Disable (WRDI) Sequence
Enable-Write-Status-Register (EWSR)
The Enable-Write-Status-Register (EWSR) instruction arms the Write-Status-Register (WRSR)
instruction and opens the status register for alteration. The Write-Status-Register instruction must be
executed immediately after the execution of the Enable-Write-Status-Register instruction. This two-
step instruction sequence of the EWSR instruction followed by the WRSR instruction works like SDP
(software data protection) command structure which prevents any accidental alteration of the status
register values. CE# must be driven low before the EWSR instruction is entered and must be driven
high before the EWSR instruction is executed.
?2012 Silicon Storage Technology, Inc.
21
DS25054A
01/12
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