參數(shù)資料
型號(hào): 25AA320X
廠(chǎng)商: Microchip Technology Inc.
元件分類(lèi): EEPROM
英文描述: 32K SPI Bus Serial EEPROM
中文描述: 32K的SPI總線(xiàn)串行EEPROM
文件頁(yè)數(shù): 9/24頁(yè)
文件大?。?/td> 383K
代理商: 25AA320X
2004 Microchip Technology Inc.
DS21227E-page 9
25AA320/25LC320/25C320
3.4
Write Enable (
WREN
) and Write
Disable (
WRDI
)
The 25XX320 contains a write enable latch. See
Table 3-3 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 3-4:
WRITE ENABLE SEQUENCE
FIGURE 3-5:
WRITE DISABLE SEQUENCE
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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