PCF2129AT NXP [NXP Semiconductors], PCF2129AT Datasheet - Page 27

• Manufacturer Part Number: PCF2129AT
• Description: Integrated RTC, TCXO and quartz crystal
• Manufacturer: NXP [NXP Semiconductors]

NXP Semiconductors
PCF2129A_1
Product data sheet
8.9.1 Register Second_alarm
8.9.2 Register Minute_alarm
8.9.3 Register Hour_alarm
Table 25.
[1]
Table 26.
[1]
Table 27.
[1]
[2]
Bit
7
6 to 4 SECOND_ALARM
3 to 0
Bit
7
6 to 4 MINUTE_ALARM
3 to 0
Bit
7
6
12 hour mode
5
4
3 to 0
24 hour mode
5 to 4 HOUR_ALARM
3 to 0
Default value.
Default value.
Default value.
Hour mode is set by the bit 12_24 in register Control_1.
Symbol
AE_S
Symbol
AE_M
Symbol
AE_H
-
AMPM
HOUR_ALARM
Second_alarm - second alarm register (address 0Ah) bit description
Minute_alarm - minute alarm register (address 0Bh) bit description
Hour_alarm - hour alarm register (address 0Ch) bit description
[2]
[2]
Rev. 01 — 13 January 2010
Value
0
1
0 to 5
0 to 9
Value
0
1
0 to 5
0 to 9
Value
0
1
-
1
0 to 9
0 to 2
0 to 9
0
0 to 1
[1]
[1]
[1]
Place value Description
-
-
ten’s place
unit place
Place value Description
-
-
ten’s place
unit place
Place value Description
-
-
-
-
-
ten’s place
unit place
ten’s place
unit place
Integrated RTC, TCXO and quartz crystal
second alarm is enabled
second alarm is disabled
second alarm information coded in BCD
format
minute alarm is enabled
minute alarm is disabled
minute alarm information coded in BCD
format
hour alarm is enabled
hour alarm is disabled
unused
indicates AM
indicates PM
hour alarm information coded in BCD
format when in 12 hour mode
hour alarm information coded in BCD
format when in 24 hour mode
PCF2129A
© NXP B.V. 2010. All rights reserved.
27 of 68