MCP795W2X datasheet(22/54 Pages) MICROCHIP

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MCP795W1X/MCP795W2X

DS22280C-page 22

Preliminary

 2011-2012 Microchip Technology Inc.

HOURS 0X15

U-0

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

bit 5

10 HOUR AM/PM

bit 4

10 HOUR

bit 3-0

HOUR<3:0>

DAY 0X16

R/W

ALM1PIN

ALM1C2

ALM1C1

ALM1C0

ALM1IF

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

ALM1PIN: Alarm 1 Output Pin Configuration bit

This pin configures the pin that is used for the Alarm 1 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

ALM1C<2:0>: Alarm 1 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

ALM1IF: Alarm 1 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>

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