PCF8564A datasheet(31/86 Pages) NXP

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NXP Semiconductors

PCA2131

Nano-power highly accurate RTC with integrated quartz crystal for automotive applications

Upper-digit

(ten’s place)

Digit (unit place)

Month

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

May

June

July

August

September

October

November

December

Table 42. Month assignments in BCD format...continued

7.9.8 Register Years

Bits labeled as T are unused and return 0 when read

Bit

Symbol

YEARS (0 to 99)

Reset

value

Table 43. Years - years register (address 0Dh) bit allocation

Bits labeled as T are unused and return 0 when read

Bit

Symbol

Value

Place value Description

7 to 4

0 to 9

ten’s place

3 to 0

YEARS

0 to 9

unit place

actual year coded in BCD format

Table 44. Years - years register (address 0Dh) bit description

7.9.9 Setting and reading the time

Figure 13 shows the data flow and data dependencies starting from the 100 Hz/1 Hz

clock tick.

PCA2131

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

Product data sheet

Rev. 1.0 — 26 July 2021

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