PCF85063ATLSLASH1 datasheet(55/55 Pages) NXP

55 / 55 page

NXP Semiconductors

PCF85063A

Tiny Real-Time Clock/calendar with alarm function and I2C-bus

Contents

General description .........................................1

Features and benefits ..................................... 1

Applications ..................................................... 1

Ordering information .......................................1

4.1

Ordering options ................................................ 2

Block diagram ..................................................2

Pinning information .........................................3

6.1

Pinning ...............................................................3

6.2

Pin description ................................................... 3

Functional description .................................... 4

7.1

Registers organization .......................................5

7.2

Control registers ................................................ 5

7.2.1

7.2.1.1

EXT_TEST: external clock test mode ................ 6

7.2.1.2

STOP: STOP bit function ...................................7

7.2.1.3

Software reset ................................................... 9

7.2.2

7.2.2.1

Alarm interrupt ................................................. 11

7.2.2.2

MI and HMI: minute and half minute

interrupt ............................................................12

7.2.2.3

TF: timer flag ................................................... 12

7.2.2.4

COF[2:0]: Clock output frequency ................... 13

7.2.3

7.2.3.1

Correction when MODE = 0 ............................ 14

7.2.3.2

Correction when MODE = 1 ............................ 15

7.2.3.3

Offset calibration workflow ...............................16

7.2.4

7.3

Time and date registers ...................................18

7.3.1

7.3.1.1

OS: Oscillator stop .......................................... 19

7.3.2

7.3.3

7.3.4

7.3.5

7.3.6

7.3.7

7.4

Setting and reading the time ........................... 21

7.5

Alarm registers ................................................ 23

7.5.1

7.5.2

7.5.3

7.5.4

7.5.5

7.5.6

Alarm function ..................................................24

7.6

Timer registers .................................................25

7.6.1

7.6.2

7.6.3

Timer functions ................................................ 26

7.6.3.1

Countdown timer interrupts ..............................28

Characteristics of the I2C-bus interface ...... 28

8.1

Bit transfer ....................................................... 28

8.2

START and STOP conditions .......................... 29

8.3

System configuration ....................................... 29

8.4

Acknowledge ....................................................29

8.5

I2C-bus protocol .............................................. 30

8.5.1

Addressing .......................................................30

8.5.2

Clock and calendar READ or WRITE cycles ....30

8.5.2.1

I2C-bus error recovery technique .................... 31

Internal circuitry .............................................32

Safety notes ................................................... 32

Limiting values ...............................................32

Characteristics ...............................................33

Application information ................................ 40

Package outline ............................................. 41

Handling information .....................................44

Packing information ...................................... 44

16.1

Tape and reel information ................................44

Soldering of SMD packages ......................... 44

17.1

Introduction to soldering .................................. 44

17.2

Wave and reflow soldering .............................. 44

17.3

Wave soldering ................................................45

17.4

Reflow soldering .............................................. 45

Footprint information .................................... 46

Appendix .........................................................48

19.1

Real-Time Clock selection ............................... 48

Abbreviations .................................................49

References ......................................................49

Revision history .............................................50

Legal information ...........................................51

Please be aware that important notices concerning this document and the product(s)

described herein, have been included in section 'Legal information'.

For more information, please visit: https://www.nxp.com

Date of release: 8 November 2023

Document identifier: PCF85063A

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