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MCP79521 Datasheet(PDF) 24 Page - Micro Analog systems

Part # MCP79521
Description  3V SPI Real-Time Clock Calendar with Battery Switchover
PDF  50 Pages
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Manufacturer  MAS [Micro Analog systems]
Direct Link  http://www.mas-oy.com
Logo MAS - Micro Analog systems

MCP79521 Datasheet(HTML) 24 Page - Micro Analog systems

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MCP7952X/MCP7951X
DS22300A-page 24
Preliminary
 2012 Microchip Technology Inc.
9.0
POWER-UP TIME REGISTERS
Note:
It is strongly recommended that the timesaver function only be used when the oscillator is running. This
will ensure accurate functionality.
REGISTER 9-1:
MINUTES 0X1C
U-0
R/W
R/W
—
10 Minutes
Minutes
bit 7
bit 6
bit 4 bit 3
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
bit 7
Unimplemented: Read as ‘0’
bit 6-4
10 MINUTES<2:0>: 10 Minutes
bit 3-0
MINUTES<3:0>: Minutes
REGISTER 9-2:
HOURS 0X1D
U-0
R/W
R/W
—
12/24
10 Hour
AM/PM
10 Hour
Hour
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
Unimplemented: Read as ‘0’
bit 6
12/24: This is a copy of the status of the bit in register 0x03:6 at the time of the event
bit 5
10 HOUR AM/PM
bit 4
10 HOUR
bit 3-0
HOUR<3:0>
REGISTER 9-3:
DATE 0X1E
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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