MCP79520 datasheet(26/58 Pages) MICROCHIP

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MCP7951X/MCP7952X

DS20002300D-page 26

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ALMxWKDAY: ALARM 0/1 WEEKDAY VALUE REGISTER

(ADDRESSES 0x0F/0x16)

U-0

R/W-0

R/W-1

—

ALMxMSK2

ALMxMSK1 ALMxMSK0

ALMxIF

WKDAY2

WKDAY1

WKDAY0

bit 7

bit 0

Legend:

R = Readable bit

W = Writable bit

U = Unimplemented bit, read as ‘0’

-n = Value at POR

‘1’ = Bit is set

‘0’ = Bit is clear

x = Bit is unknown

bit 7

Unimplemented: Read as ‘0’

bit 6-4

ALMxMSK<2:0>: Alarm Mask bits

000 = Seconds match

001 = Minutes match

010 = Hours match (logic takes into account 12-/24-hour operation)

011 = Day of week match

100 = Date match

101 = Hundredth of Seconds(1)

110 = Reserved; do not use

111 = Seconds, Minutes, Hour, Day of Week, Date and Month(2)

bit 3

ALMxIF: Alarm Interrupt Flag bit(3)

1 = Alarm match occurred (must be cleared in software)

0 = Alarm match did not occur

bit 2-0

WKDAY<2:0>: Binary-Coded Decimal Value of Day bits

Contains a value from 1 to 7. The representation is user-defined.

Note 1: Hundredth of seconds matching is available on Alarm 1 only. This setting is reserved on Alarm 0.

2: Month matching is available on Alarm 0 only.

3: The ALMxIF bit can be cleared by writing a ‘0’. Once cleared, the ALMxIF bit cannot be written to a ‘1’ in

software.

ALMxDATE: ALARM 0/1 DATE VALUE REGISTER (ADDRESSES 0x10/0x17)

U-0

R/W-0

R/W-1

—

DATETEN1

DATETEN0 DATEONE3

DATEONE2

DATEONE1

DATEONE0

bit 7

bit 0

Legend:

R = Readable bit

W = Writable bit

U = Unimplemented bit, read as ‘0’

-n = Value at POR

‘1’ = Bit is set

‘0’ = Bit is clear

x = Bit is unknown

bit 7-6

Unimplemented: Read as ‘0’

bit 5-4

DATETEN<1:0>: Binary-Coded Decimal Value of Date’s Tens Digit

Contains a value from 0 to 3

bit 3-0

DATEONE<3:0>: Binary-Coded Decimal Value of Date’s Ones Digit

Contains a value from 0 to 9

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