PCF2131 datasheet(8/86 Pages) NXP

8 / 86 page

NXP Semiconductors

PCF2131

Nano-power highly accurate RTC with integrated quartz crystal

Bit positions labeled as T are unused and return 0 when read. Bits labeled as X are undefined at power-on and unchanged by subsequent resets.

Bit

Address

Reset value

Reference

13h

CLKOUT_ctl

TCR[1:0]

OTPR

COF[2:0]

00X0 0000

Table 15

Timestamp1 registers

14h

Timestp_ctl1

TSM

TSOFF

SUBSEC_TIMESTP[4:0]

0000 0000

Table 64

15h

Sec_timestp1

SECOND_TIMESTP (0 to 59)

0000 0000

Table 66

16h

Min_timestp1

MINUTE_TIMESTP (0 to 59)

0000 0000

Table 68

AMPM

HOUR_TIMESTP (1 to 12) in 12-hour mode

0000 0000

17h

Hour_timestp1

HOUR_TIMESTP (0 to 23) in 24-hour mode

0000 0000

Table 70

18h

Day_timestp1

DAY_TIMESTP (1 to 31)

0000 0000

Table 72

19h

Mon_timestp1

MONTH_TIMESTP (1 to 12)

0000 0000

Table 74

1Ah

Year_timestp1

YEAR_TIMESTP (0 to 99)

0000 0000

Table 76

Timestamp2 registers

1Bh

Timestp_ctl2

TSM

TSOFF

SUBSEC_TIMESTP[4:0]

0000 0000

Table 64

1Ch

Sec_timestp2

SECOND_TIMESTP (0 to 59)

0000 0000

Table 66

1Dh

Min_timestp2

MINUTE_TIMESTP (0 to 59)

0000 0000

Table 68

AMPM

HOUR_TIMESTP (1 to 12) in 12-hour mode

0000 0000

1Eh

Hour_timestp2

HOUR_TIMESTP (0 to 23) in 24-hour mode

0000 0000

Table 70

1Fh

Day_timestp2

DAY_TIMESTP (1 to 31)

0000 0000

Table 72

20h

Mon_timestp2

MONTH_TIMESTP (1 to 12)

0000 0000

Table 74

21h

Year_timestp2

YEAR_TIMESTP (0 to 99)

0000 0000

Table 76

Timestamp3 registers

22h

Timestp_ctl3

TSM

TSOFF

SUBSEC_TIMESTP[4:0]

0000 0000

Table 64

23h

Sec_timestp3

SECOND_TIMESTP (0 to 59)

0000 0000

Table 66

24h

Min_timestp3

MINUTE_TIMESTP (0 to 59)

0000 0000

Table 68

AMPM

HOUR_TIMESTP (1 to 12) in 12-hour mode

0000 0000

25h

Hour_timestp3

HOUR_TIMESTP (0 to 23) in 24-hour mode

0000 0000

Table 70

26h

Day_timestp3

DAY_TIMESTP (1 to 31)

0000 0000

Table 72

27h

Mon_timestp3

MONTH_TIMESTP (1 to 12)

0000 0000

Table 74

Table 4. Register overview...continued

PCF2131

All information provided in this document is subject to legal disclaimers.

Product data sheet

Rev. 1.0 — 28 May 2021

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