PCF8563
NXP Semiconductors
Real-time clock/calendar
8.6 Alarm registers
8.6.1 Register Minute_alarm
Table 18. Minute_alarm - minute alarm register (address 09h) bit description
Bit
Symbol
Value
Place value Description
7
AE_M
0
1[1]
-
-
minute alarm is enabled
minute alarm is disabled
6 to 4 MINUTE_ALARM
3 to 0
0 to 5
0 to 9
ten’s place minute alarm information coded in BCD
format
unit place
[1] Default value.
8.6.2 Register Hour_alarm
Table 19. Hour_alarm - hour alarm register (address 0Ah) bit description
Bit
Symbol
Value
Place value Description
7
AE_H
0
1[1]
-
-
-
hour alarm is enabled
hour alarm is disabled
unused
6
-
-
5 to 4 HOUR_ALARM
3 to 0
0 to 2
0 to 9
ten’s place hour alarm information coded in BCD
format
unit place
[1] Default value.
8.6.3 Register Day_alarm
Table 20. Day_alarm - day alarm register (address 0Bh) bit description
Bit
Symbol
Value
Place value Description
7
AE_D
0
1[1]
-
-
-
day alarm is enabled
day alarm is disabled
unused
6
-
-
5 to 4 DAY_ALARM
3 to 0
0 to 3
0 to 9
ten’s place day alarm information coded in BCD
format
unit place
[1] Default value.
8.6.4 Register Weekday_alarm
Table 21. Weekday_alarm - weekday alarm register (address 0Ch) bit description
Bit
Symbol
Value
Description
7
AE_W
0
1[1]
weekday alarm is enabled
weekday alarm is disabled
unused
6 to 3 -
-
2 to 0 WEEKDAY_ALARM 0 to 6
[1] Default value.
weekday alarm information
PCF8563
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© NXP B.V. 2012. All rights reserved.
Product data sheet
Rev. 10 — 3 April 2012
15 of 50
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