参数资料
型号: 25A512T-I/ST
厂商: Microchip Technology
文件页数: 11/34页
文件大小: 0K
描述: IC EEPROM 512KBIT 10MHZ 8TSSOP
标准包装: 2,500
格式 - 存储器: EEPROMs - 串行
存储器类型: EEPROM
存储容量: 512K (64K x 8)
速度: 10MHz
接口: SPI 3 线串行
电源电压: 1.7 V ~ 3 V
工作温度: -40°C ~ 85°C
封装/外壳: 8-TSSOP(0.173",4.40mm 宽)
供应商设备封装: 8-TSSOP
包装: 带卷 (TR)
25A512
2.3
Write Enable ( WREN ) and Write
Disable ( WRDI )
The following is a list of conditions under which the
write enable latch will be reset:
The 25A512 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.
?
?
?
?
?
?
?
Power-up/BOR
WRDI instruction successfully executed
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
High-Impedance
SO
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
? 2010-2011 Microchip Technology Inc.
Preliminary
DS22237C-page 11
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