PCF2127ATSLASH1 datasheet(43/80 Pages) NXP

43 / 80 page

PCF2127A_2

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Product data sheet

Rev. 02 — 7 May 2010

43 of 80

NXP Semiconductors

PCF2127A

Integrated RTC, TCXO and quartz crystal

8.12.3.4

[1]

Hour mode is set by the bit 12_24 in register Control_1.

8.12.3.5

8.12.3.6

8.12.3.7

Table 48.

Hour_timestp - hour timestamp register (address 15h) bit description

Bit

Symbol

Value

Place value Description

7to6 -

unused

12 hour mode[1]

AMPM

indicates AM

indicates PM

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 49.

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 50.

Mon_timestp - month timestamp register (address 17h) bit description

Bit

Symbol

Value

Place value Description

7to5 -

unused

MONTH_TIMESTP

0 to 1

ten’s place

month timestamp information coded in

BCD format

3to0

0to9

unit place

Table 51.

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

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