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NXP Semiconductors

UM10699

User manual for SPI-bus RTC demoboard OM11059UL

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

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

© NXP B.V. 2020.

All rights reserved.

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

For sales office addresses, please send an email to: [email protected]

Date of release: 18 August 2020

Document identifier: UM10699

Contents

1

Introduction ......................................................... 3

2

Key features ........................................................ 3

2.1

PCF85063BTL ................................................... 3

3

Hardware set-up ..................................................4

3.1

General  requirements  for  the  RTC

PCF85063BTL ................................................... 4

3.2

Demo board OM11059UL ................................. 6

4

Software set-up ................................................... 8

4.1

Functionality .......................................................8

4.2

System testing ................................................... 9

4.3

Software instructions for setting the clock ..........9

4.3.1

Setting the time ................................................. 9

4.3.2

Reading the clock ..............................................9

5

RTC tuning .........................................................10

5.1

Frequency tuning .............................................10

6

OM11059UL Board FCC-CE EMC Position ......12

7

Legal information ..............................................14

Содержание OM11059UL

Страница 1: ... Rev 3 18 August 2020 User manual Document information Information Content Keywords PCF85063BTL OM11059UL demoboard how to get started SPI bus RTC Real Time Clock tuning Abstract User manual for the RTC SPI bus demoboard OM11059UL which contains PCF85063BTL ...

Страница 2: ...ion provided in this document is subject to legal disclaimers NXP B V 2020 All rights reserved User manual Rev 3 18 August 2020 2 16 Revision history Rev Date Description v 3 20200819 Added Section 6 changed OM11059 to OM11059UL throughout v 2 20150212 revised version v 1 20130404 Initial version ...

Страница 3: ...any project just power and SPI bus must be hooked up A separate demoboard and a user manual are available for the I 2 C bus RTCs PCF85063AT OM13515 and UM10788 2 Key features The RTC PCF85063BTL with SPI bus is mounted together with a quartz crystal and the blocking capacitor buffering the supply voltage 2 1 PCF85063BTL The RTC PCF85063BTL is a Real Time Clock with very small form factor counting ...

Страница 4: ...crystal must be placed close to the RTC circuit avoiding long lines which may pick up noise Avoid any tracks with high frequency signals fast edges close to the RTC quartz or quartz interconnect The interface uses a three line standard SPI protocol chip enable serial clock serial data I O operating up to 8 MHz Supply voltage The RTC is specified from 1 8 V to 5 5 V The RTC excluding the SPI bus in...

Страница 5: ...manual for SPI bus RTC demoboard OM11059UL UM10699 All information provided in this document is subject to legal disclaimers NXP B V 2020 All rights reserved User manual Rev 3 18 August 2020 5 16 Table 2 Interfacing to microcontroller ...

Страница 6: ...laimers NXP B V 2020 All rights reserved User manual Rev 3 18 August 2020 6 16 3 2 Demo board OM11059UL Table 3 Picture and layout of demo bard OM11059UL The OM11059UL allows to easily demonstrate operation of the PCF85063BTL with SPI bus interface No need to solder the tiny package to a breadboard 100 mil connector for straight forward connections ...

Страница 7: ...s on the market with different load capacitance CL 12 5 pF is most common 7 pF offers however lower power consumption By default a quartz with 7 pF is mounted Additional landing pads are available on the board to take a quartz in a tubular package Straight forward interfacing Connect supply voltage e g 3 3 V VSS to pin 1 VDD to pin 2 Connect SPI bus CE to pin 4 SCL to pin 3 SDI O to pin 7 Communic...

Страница 8: ... RTC must be finalized within one second after initiating it otherwise time counter increments could be lost During access the time registers of the RTC are frozen and after the read or write sequence is completed a seconds increment is executed if required The clock tracks the actual time from seconds to year It must be initially set to the correct time of the actual time zone The days per month ...

Страница 9: ...February 14 2015 Name Address Setting CE chip enable Register address 0000 0000 address pointer to status word 0 0000 0011 set 12 hour mode and select option for 12 5 pF quartz Status word 0 0000 0010 set 12 hour mode and select option for 7 pF quartz CE chip disable CE chip enable Register address 0000 0100 address pointer to seconds register Seconds 0000 0000 0 seconds clock integrity ok MSB OS ...

Страница 10: ...where above tolerances can be compensated Tuning procedure Measure the 32xxx Hz f signal at the CLKOUT pin The offset is calculated in ppm as Δf ppm 10 6 f 32768 32768 Consult the offset table in the data sheet Take the correction value and write it into the register 02h The correction is done by means of inhibition or addition the oscillator runs at constant speed then every 2 hours mode 0 1 seco...

Страница 11: ... provided in this document is subject to legal disclaimers NXP B V 2020 All rights reserved User manual Rev 3 18 August 2020 11 16 Table 8 Temperature averaged over application range 5 C to 45 C 1 Characteristic if tuned to 32 768 kHz at 25 ºC 2 Characteristic if tuned with the positive offset Δfoff ...

Страница 12: ...d non functional The purpose of the board is to allow customers to evaluate function of the PCF85063BTL device based on how the customer manipulates the inputs on the board Overview and Position Based on our review of the documentation in Agile for OM11059UL the OM11059UL board is considered a non functional component Since it is non functional as sold it is considered a component from an FCC and ...

Страница 13: ...t and when assembled may not be resold or otherwise marketed unless all required FCC equipment authorizations are first obtained Operation is subject to the condition that this product not cause harmful interference to licensed radio stations and that this product accept harmful interference Unless the assembled kit is designed to operate under part 15 part 18 or part 95 of this chapter the operat...

Страница 14: ...and products planned as well as for the planned application and use of customer s third party customer s Customers should provide appropriate design and operating safeguards to minimize the risks associated with their applications and products NXP Semiconductors does not accept any liability related to any default damage costs or problem which is based on any weakness or default in the customer s ...

Страница 15: ...al Rev 3 18 August 2020 15 16 Tables Tab 1 Block diagram of the PCF85063BTL RTC 4 Tab 2 Interfacing to microcontroller 5 Tab 3 Picture and layout of demo bard OM11059UL 6 Tab 4 OM11059UL block diagram 7 Tab 5 OM11059UL schematics 8 Tab 6 Setting the clock to 3 45 pm February 14 2015 9 Tab 7 Reading the clock 2 minutes after writing 9 Tab 8 Temperature averaged over application range 5 C to 45 C 11...

Страница 16: ...s please send an email to salesaddresses nxp com Date of release 18 August 2020 Document identifier UM10699 Contents 1 Introduction 3 2 Key features 3 2 1 PCF85063BTL 3 3 Hardware set up 4 3 1 General requirements for the RTC PCF85063BTL 4 3 2 Demo board OM11059UL 6 4 Software set up 8 4 1 Functionality 8 4 2 System testing 9 4 3 Software instructions for setting the clock 9 4 3 1 Setting the time...

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