Datasheet

PCF2127AT All information provided in this document is subject to legal disclaimers. © NXP B.V. 2013. All rights reserved.
Product data sheet Rev. 6 — 11 July 2013 45 of 86
NXP Semiconductors
PCF2127AT
Integrated RTC, TCXO and quartz crystal
8.12.3.4 Register Hour_timestp
[1] Hour mode is set by the bit 12_24 in register Control_1.
8.12.3.5 Register Day_timestp
8.12.3.6 Register Mon_timestp
8.12.3.7 Register Year_timestp
Table 49. Hour_timestp - hour timestamp register (address 15h) bit description
Bit Symbol Value Place value Description
7to6 - - - unused
12 hour mode
[1]
5 AMPM 0 - indicates AM
1 - indicates PM
4 HOUR_TIMESTP 0 to 1 ten’s place hour timestamp information coded in BCD
format when in 12 hour mode
3to0 0to9 unit place
24 hour mode
[1]
5 to 4 HOUR_TIMESTP 0 to 2 ten’s place hour timestamp information coded in BCD
format when in 24 hour mode
3to0 0to9 unit place
Table 50. Day_timestp - day timestamp register (address 16h) bit description
Bit Symbol Value Place value Description
7to6 - - - unused
5 to 4 DAY_TIMESTP 0 to 3 ten’s place day timestamp information coded in BCD
format
3to0 0to9 unit place
Table 51. Mon_timestp - month timestamp register (address 17h) bit description
Bit Symbol Value Place value Description
7to5 - - - unused
4 MONTH_TIMESTP 0 to 1 ten’s place month timestamp information coded in
BCD format
3to0 0to9 unit place
Table 52. Year_timestp - year timestamp register (address 18h) bit description
Bit Symbol Value Place value Description
7 to 4 YEAR_TIMESTP 0 to 9 ten’s place year timestamp information coded in BCD
format
3to0 0to9 unit place