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MCP79522 데이터시트(PDF) 10 Page - Micro Analog systems

부품명 MCP79522
상세설명  3V SPI Real-Time Clock Calendar with Battery Switchover
PDF  50 Pages
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제조업체  MAS [Micro Analog systems]
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MCP79522 데이터시트(HTML) 10 Page - Micro Analog systems

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MCP7952X/MCP7951X
DS22300A-page 10
Preliminary
 2012 Microchip Technology Inc.
3.3
Write Enable (EEWREN) and Write
Disable (EEWRDI)
The MCP795XX contains a write enable latch.
This latch must be set before any EEWRITE,
SRWRITE and IDWRITE operation will be completed
internally. The EEWREN instruction will set the latch, and
the EEWRDI will reset the latch.
The following is a list of conditions under which the
write enable latch will be reset:
• Power-up
• EEWRDI instruction successfully executed
• SRWRITE instruction successfully executed
• EEWRITE instruction successfully executed
• IDWRITE instruction successfully executed
FIGURE 3-4:
WRITE ENABLE SEQUENCE (EEWREN)
FIGURE 3-5:
WRITE DISABLE SEQUENCE (EEWRDI)
SCK
0
2
34
56
7
1
SI
High-Impedance
SO
CS
01
00
00
0
1
SCK
0
2345
67
1
SI
High-Impedance
SO
CS
01
00
00
0
0



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