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MCP795B21 数据表(PDF) 19 Page - Micro Analog systems

部件名 MCP795B21
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

MCP795B21 数据表(HTML) 19 Page - Micro Analog systems

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 2011 Microchip Technology Inc.
Preliminary
DS22280A-page 19
MCP795WXX/MCP795BXX
REGISTER 6-4:
DAY 0X0F
REGISTER 6-5:
DATE 0X10
RW
RW
RW
RW
ALM0PIN
ALM0C2
ALM0C1
ALM0C0
ALM0IF
Day
bit 7
bit6
bit 4
bit 3
bit 2
bit 0
Legend: R = Readable Bit W = Writable Bit U = Unimplemented bit, Read as ‘0’
bit 7
Bit 7 configures the pin that is used for the Alarm 0 output. If this bit is clear the IRQ pin is used. If set, the
WDO pin is used. If the WDT is enabled then a valid Alarm will assert the WDO pin for 122 us.
BIT 6:4
Bits <6:4> sets the condition on what the Alarm will trigger. The following options are available:
000 – Seconds match
001 – Minutes match
010 – Hours match (logic takes into account 12/24 operation)
011 – Day match. Generates interrupt at 12:00:00 AM
100 – Date match
101 – Unimplemented, do not use
110 – Unimplemented, do not use
111 – Seconds, Minutes, Hour, Day, Date and Month
bit 3
Bit 3 is the ALM0IF bit. This is set by hardware when an alarm condition has be generated. The bit must
be cleared in software.
bit 2-0
Day
U
U
RW
RW
RW
10 Date
Date
bit 7
bit 6
bit 5
bit 4
bit 3
bit 0
Legend: R = Readable Bit W = Writable Bit U = Unimplemented bit, Read as ‘0’
bit 7-6
Unimplemented
bit 5-4
10 Date
bit 3-0
Date



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