PCA2129T/Q900/2,51 NXP Semiconductors, PCA2129T/Q900/2,51 Datasheet - Page 8

• Manufacturer Part Number: PCA2129T/Q900/2,51
• Description: Real Time Clock
• Manufacturer: NXP Semiconductors
• Series: PCA2129r

Specifications of PCA2129T/Q900/2,51

• Rohs: yes
• Function: Clock, Calendar, Alarm, Watchdog, Timestamp
• Rtc Bus Interface: I2C, SPI
• Date Format: Binary
• Time Format: Binary
• Supply Voltage - Max: 4.2 V
• Supply Voltage - Min: 1.8 V
• Maximum Operating Temperature: + 80 C
• Minimum Operating Temperature: - 30 C
• Mounting Style: SMD/SMT
• Package / Case: SOP-16
• Battery Backup Switching: Yes

Table 5.
Bit positions labeled as - are not implemented and will return 0 when read. Bits labeled as T must always be written with logic 0. Bits labeled as X are undefined at
power-on and unchanged by subsequent resets.
Address
13h
14h
15h
16h
17h
18h
Aging offset register
19h
Internal registers
1Ah
1Bh
Register overview
Register name
Sec_timestp
Min_timestp
Hour_timestp
Day_timestp
Mon_timestp
Year_timestp
Aging_offset
Internal_reg
Internal_reg
…continued
Bit
7
-
-
-
-
-
YEAR_TIMESTP (0 to 99)
-
-
-
6
SECOND_TIMESTP (0 to 59)
MINUTE_TIMESTP (0 to 59)
-
-
-
-
-
-
5
AMPM
HOUR_TIMESTP (0 to 23) in 24 h mode
DAY_TIMESTP (1 to 31)
-
-
-
-
4
HOUR_TIMESTP (1 to 12) in 12 h mode
MONTH_TIMESTP (1 to 12)
-
-
-
3
AO[3:0]
-
-
2
-
-
1
-
-
0
-
-
Reset value
- XXX XXXX
- XXX XXXX
- - XX XXXX
- - XX XXXX
- - XX XXXX
- - - X XXXX
XXXX XXXX
- - - - 1000
- - - - - - - -
- - - - - - - -
Reference
Table 39 on page 35
Table 40 on page 35
Table 41 on page 36
Table 42 on page 36
Table 43 on page 36
Table 44 on page 36
Table 12 on page 14
-
-