Datasheet

PCA8565 All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2014. All rights reserved.
Product data sheet Rev. 4 — 5 December 2014 14 of 48
NXP Semiconductors
PCA8565
Real time clock/calendar
8.6.1 Register Minute_alarm
[1] Default value.
8.6.2 Register Hour_alarm
[1] Default value.
(1) Only when all enabled alarm settings are matching.
It’s only on increment to a matched case that the alarm is set, see Section 8.9.1.1
.
Fig 7. Alarm function block diagram
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Table 19. Register Minute_alarm (address 09h) bits description
Bit Symbol Value Place value Description
7 AE_M 0 - minute alarm is enabled
1
[1]
- minute alarm is disabled
6 to 4 MINUTE_ALARM 0 to 5 ten’s place minute alarm information coded in BCD
format
3 to 0 0 to 9 unit place
Table 20. Register Hour_alarm (address 0Ah) bits description
Bit Symbol Value Place value Description
7 AE_H 0 - hour alarm is enabled
1
[1]
- hour alarm is disabled
6 - - - unused
5 to 4 HOUR_ALARM 0 to 2 ten’s place hour alarm information coded in BCD
format
3 to 0 0 to 9 unit place