Datasheet

 2012-2018 Microchip Technology Inc. DS20002300C-page 25
MCP7951X/MCP7952X
REGISTER 5-13: ALMxWKDAY: ALARM 0/1 WEEKDAY VALUE REGISTER
(ADDRESSES 0x0F/0x16)
U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-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.
REGISTER 5-14: ALMxDATE: ALARM 0/1 DATE VALUE REGISTER (ADDRESSES 0x10/0x17)
U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-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