25AA512
2.3
Write Enable ( WREN ) and Write
Disable ( WRDI )
?
?
Power-up
WRDI instruction successfully executed
The 25AA512 contains a write enable latch. See
Table 2-4 for the Write-Protect Functionality Matrix.
This latch must be set before any write operation will be
completed internally. The WREN instruction will set the
latch, and the WRDI will reset the latch.
The following is a list of conditions under which the
write enable latch will be reset:
?
?
?
?
?
WRSR instruction successfully executed
WRITE instruction successfully executed
PE instruction successfully executed
SE instruction successfully executed
CE instruction successfully executed
FIGURE 2-4:
WRITE ENABLE SEQUENCE ( WREN )
CS
0
1
2
3
4
5
6
7
SCK
SI
0
0
0
0
0
1
1
0
SO
High-Impedance
FIGURE 2-5:
WRITE DISABLE SEQUENCE ( WRDI )
CS
0
1
2
3
4
5
6
7
SCK
SI
0
0
0
0
0
1
1 0
0
High-Impedance
SO
? 2010 Microchip Technology Inc.
DS22021F-page 11
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相关代理商/技术参数
25AA512T-I/P 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:512 Kbit SPI Bus Serial EEPROM
25AA512T-I/SM 功能描述:电可擦除可编程只读存储器 512k 64KX8 1.8V SER EE IND RoHS:否 制造商:Atmel 存储容量:2 Kbit 组织:256 B x 8 数据保留:100 yr 最大时钟频率:1000 KHz 最大工作电流:6 uA 工作电源电压:1.7 V to 5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8
25AA512T-I/SN 功能描述:电可擦除可编程只读存储器 512k 64KX8 1.8V SER EE IND RoHS:否 制造商:Atmel 存储容量:2 Kbit 组织:256 B x 8 数据保留:100 yr 最大时钟频率:1000 KHz 最大工作电流:6 uA 工作电源电压:1.7 V to 5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8
25AA640 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:64K SPI Bus Serial EEPROM
25AA640/25LC640 制造商:未知厂家 制造商全称:未知厂家 功能描述:25AA640/25LC640
25AA640/S 功能描述:电可擦除可编程只读存储器 64k, 8K X 8 , 1.8V SER EE, DIE in WAFFLE PK RoHS:否 制造商:Atmel 存储容量:2 Kbit 组织:256 B x 8 数据保留:100 yr 最大时钟频率:1000 KHz 最大工作电流:6 uA 工作电源电压:1.7 V to 5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8
25AA640/W 制造商:Microchip Technology Inc 功能描述:64K, 8K X 8 , 1.8V SER EE, WAFER - Gel-pak, waffle pack, wafer, diced wafer on film
25AA640/WF 制造商:Microchip Technology Inc 功能描述:64K, 8K X 8 , 1.8V SER EE, WA - Gel-pak, waffle pack, wafer, diced wafer on film