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MCP795W21 数据表(PDF) 10 Page - Micro Analog systems

部件名 MCP795W21
功能描述  SPI Real-Time Clock Calendar
PDF  54 Pages
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制造商  MAS [Micro Analog systems]
网页  http://www.mas-oy.com
标志 MAS - Micro Analog systems

MCP795W21 数据表(HTML) 10 Page - Micro Analog systems

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MCP795WXX/MCP795BXX
DS22280A-page 10
Preliminary
 2011 Microchip Technology Inc.
3.3
Write Enable (EEWREN) and Write
Disable (EEWRDI)
The MCP795XXX 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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