參數(shù)資料
型號(hào): 25AA320A
廠商: Microchip Technology Inc.
元件分類: EEPROM
英文描述: 32K SPI Bus Serial EEPROM
中文描述: 32K的SPI總線串行EEPROM
文件頁數(shù): 9/26頁
文件大?。?/td> 303K
代理商: 25AA320A
2007 Microchip Technology Inc.
DS21828C-page 9
25AA320A/25LC320A
2.4
Write Enable (
WREN
) and Write
Disable (
WRDI
)
The 25XX320A 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:
Power-up
WRDI
instruction successfully executed
WRSR
instruction successfully executed
WRITE
instruction successfully executed
FIGURE 2-4:
WRITE ENABLE SEQUENCE (
WREN
)
FIGURE 2-5:
WRITE DISABLE SEQUENCE (
WRDI
)
SCK
0
2
3
4
5
6
7
1
SI
High-Impedance
SO
CS
0
1
0
0
0
0
0
1
SCK
0
2
3
4
5
6
7
1
SI
High-Impedance
SO
CS
0
1
0
0
0
0
0
1
0
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