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MCP795W21 数据表(PDF) 19 Page - Microchip Technology

部件名 MCP795W21
功能描述  3V SPI Real-Time Clock Calendar with Enhanced Features and Battery Switchover
PDF  54 Pages
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制造商  MICROCHIP [Microchip Technology]
网页  http://www.microchip.com
标志 MICROCHIP - Microchip Technology

MCP795W21 数据表(HTML) 19 Page - Microchip Technology

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 2011-2012 Microchip Technology Inc.
Preliminary
DS22280C-page 19
MCP795W1X/MCP795W2X
REGISTER 6-4:
DAY 0X0F
R/W
R/W
R/W
R/W
ALM0PIN
ALM0C2
ALM0C1
ALM0C0
ALM0IF
Day
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
bit 7
ALM0PIN: Alarm 0 Output Pin Configuration bit
This pin 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
ALM0C<2:0>: Alarm 0 Configuration bits
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
ALM0IF: Alarm 0 Interrupt Flag bit
This bit is set by hardware when an alarm condition has been generated. The bit must be cleared in
software.
bit 2-0
DAY<2:0>
Note 1:
Contains the BCD day. The range is 1-7. Also, additional bits are used for configuration and status.
REGISTER 6-5:
DATE 0X10
U-0
U-0
R/W
R/W
—
—
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: Read as ‘0’
bit 5-4
10 DATE<1:0>
bit 3-0
DATE<3:0>



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