PCF8523 View Datasheet(PDF) - NXP Semiconductors.
Part Name
Description
MFG CO.
'PCF8523' PDF : 74 Pages View PDF
NXP Semiconductors
PCF8523
Real-Time Clock (RTC) and calendar
8.7.3 Register Day_alarm
Table 24. Day_alarm - day alarm register (address 0Ch) bit description
Bit
Symbol
Value
Place value Description
7
AEN_D
0
-
day alarm is enabled
1[1]
-
day alarm is disabled
6
-
-
-
unused
5 to 4 DAY_ALARM
3 to 0
0 to 3
0 to 9
ten’s place day alarm information coded in
unit place BCD format
[1] Default value.
8.7.4 Register Weekday_alarm
Table 25. Weekday_alarm - weekday alarm register (address 0Dh) bit description
Bit
Symbol
Value
Description
7
AEN_W
0
weekday alarm is enabled
1[1]
weekday alarm is disabled
6 to 3 -
-
unused
2 to 0 WEEKDAY_ALARM 0 to 6
weekday alarm information
[1] Default value.
8.7.5 Alarm flag
FKHFNQRZVLJQDO
0,187($/$50
0,187(7,0(
+285$/$50
$(1B0
$(1B+
H[DPSOH
$(1B0
+2857,0(
'$<$/$50
$(1B'
VHWDODUPIODJ$)
'$<7,0(
:((.'$<$/$50
:((.'$<7,0(
$(1B:
DDD
(1) Only when all enabled alarm settings are matching.
It is only on increment to a matched case that the alarm flag is set, see Section 8.7.5.
Fig 15. Alarm function block diagram
PCF8523
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 7 — 28 April 2015
© NXP Semiconductors N.V. 2015. All rights reserved.
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