Datasheet
xxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxx x x x xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxx xx xx xxxxx
xxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxx xxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxx x x
xxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxx
xxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxx xxx
PCF2129 All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2014. All rights reserved.
Product data sheet Rev. 7 — 19 December 2014 8 of 86
NXP Semiconductors
PCF2129
Accurate RTC with integrated quartz crystal for industrial applications
Table 5. Register overview
Bit positions labeled as - are not implemented and 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 Register name Bit Reset value Reference
7 6 5 4 3 2 1 0
Control registers
00h Control_1 EXT_
TEST
TSTOPTSF1POR_
OVRD
12_24 MI SI 0000 1000 Table 7 on page 10
01h Control_2 MSF WDTF TSF2 AF T TSIE AIE T 0000 0000 Table 9 on page 11
02h Control_3 PWRMNG[2:0] BTSE BF BLF BIE BLIE 0000 0000 Table 11 on page 12
Time and date registers
03h Seconds OSF SECONDS (0 to 59) 1XXX XXXX Table 22 on page 25
04h Minutes - MINUTES (0 to 59) - XXX XXXX Table 25 on page 26
05h Hours - - AMPM HOURS (1 to 12) in 12-hour mode - - XX XXXX Table 27 on page 27
HOURS (0 to 23) in 24-hour mode - - XX XXXX
06h Days - - DAYS (1 to 31) - - XX XXXX Table 29 on page 27
07hWeekdays ----- WEEKDAYS (0 to 6)-----XXXTable 31 on page 28
08h Months - - - MONTHS (1 to 12) - - - X XXXX Table 34 on page 29
09h Years YEARS (0 to 99) XXXX XXXX Table 37 on page 30
Alarm registers
0Ah Second_alarm AE_S SECOND_ALARM (0 to 59) 1XXX XXXX Table 39 on page 33
0Bh Minute_alarm AE_M MINUTE_ALARM (0 to 59) 1XXX XXXX Table 41 on page 33
0Ch Hour_alarm AE_H - AMPM HOUR_ALARM (1 to 12) in 12-hour mode 1 - XX XXXX Table 43 on page 34
HOUR_ALARM (0 to 23) in 24-hour mode 1 - XX XXXX
0Dh Day_alarm AE_D - DAY_ALARM (1 to 31) 1 - XX XXXX Table 45 on page 34
0Eh Weekday_alarm AE_W - - - - WEEKDAY_ALARM (0 to 6) 1 - - - - XXX Table 47 on page 35
CLKOUT control register
0Fh CLKOUT_ctl TCR[1:0] OTPR - - COF[2:0] 00X - - 000 Table 13 on page 12
Watchdog registers
10h Watchdg_tim_ctl WD_CD T TI_TP - - - TF[1:0] 000 - - - 11 Table 49 on page 36
11h Watchdg_tim_val WATCHDG_TIM_VAL[7:0] XXXX XXXX Table 51 on page 36
Timestamp registers
12h Timestp_ctl TSM TSOFF - 1_O_16_TIMESTP[4:0] 00 - X XXXX Table 58 on page 41