PCF212311 Просмотр технического описания (PDF) - NXP Semiconductors.
Номер в каталоге
Компоненты Описание
производитель
PCF212311 Datasheet PDF : 63 Pages
| |||
NXP Semiconductors
PCF2123
SPI Real time clock/calendar
8.5 Alarm function
When one or more of these registers are loaded with a valid minute, hour, day, or
weekday and its corresponding alarm enable bit (AE_x) is logic 0, then that information
will be compared with the current minute, hour, day, and weekday.
8.5.1 Register Minute_alarm
Table 18. Minute_alarm - minute alarm register (address 09h) bit description
Bit
Symbol
Value
Place value Description
7
AE_M
0
-
minute alarm is enabled
1[1]
-
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
unit place BCD format
[1] Default value.
8.5.2 Register Hour_alarm
Table 19. Hour_alarm - hour alarm register (address 0Ah) bit description
Bit
Symbol
Value
Place value Description
7
AE_H
0
-
hour alarm is enabled
1[1]
-
hour alarm is disabled
6
-
-
-
unused
12 hour mode[2]
5
AMPM
0
-
indicates AM
1
-
indicates PM
4
HOUR_ALARM
3 to 0
0 to 1
0 to 9
ten’s place
unit place
hour alarm information coded in
BCD format when in 12 hour
mode
24 hour mode[2]
5 to 4 HOUR_ALARM
3 to 0
0 to 2
0 to 9
ten’s place
unit place
hour alarm information coded in
BCD format when in 24 hour
mode
[1] Default value.
[2] Hour mode is set by the 12_24 bit in register Control_1.
8.5.3 Register Day_alarm
Table 20. Day_alarm - day alarm register (address 0Bh) bit description
Bit
Symbol
Value
Place value Description
7
AE_D
0
-
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.
PCF2123
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 5 — 27 April 2011
© NXP B.V. 2011. All rights reserved.
17 of 63
Share Link: 