NXP Semiconductors OM11059UL User Manual Download Page 14

NXP Semiconductors

UM10699

User 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

14 / 16

7 Legal information

7.1  Definitions

Draft

 — The document is a draft version only. The content is still under

internal review and subject to formal approval, which may result in

modifications or additions. NXP Semiconductors does not give any

representations or warranties as to the accuracy or completeness of

information included herein and shall have no liability for the consequences

of use of such information.

7.2  Disclaimers

Limited warranty and liability

 — Information in this document is believed

to be accurate and reliable. However, NXP Semiconductors does not

give any representations or warranties, expressed or implied, as to the

accuracy or completeness of such information and shall have no liability

for the consequences of use of such information. NXP Semiconductors

takes no responsibility for the content in this document if provided by an

information source outside of NXP Semiconductors. In no event shall NXP

Semiconductors be liable for any indirect, incidental, punitive, special or

consequential damages (including - without limitation - lost profits, lost

savings, business interruption, costs related to the removal or replacement

of any products or rework charges) whether or not such damages are based

on tort (including negligence), warranty, breach of contract or any other

legal theory. Notwithstanding any damages that customer might incur for

any reason whatsoever, NXP Semiconductors’ aggregate and cumulative

liability towards customer for the products described herein shall be limited

in accordance with the Terms and conditions of commercial sale of NXP

Semiconductors.

Right to make changes

 — NXP Semiconductors reserves the right to

make changes to information published in this document, including without

limitation specifications and product descriptions, at any time and without

notice. This document supersedes and replaces all information supplied prior

to the publication hereof.

Suitability for use

 — NXP Semiconductors products are not designed,

authorized or warranted to be suitable for use in life support, life-critical or

safety-critical systems or equipment, nor in applications where failure or

malfunction of an NXP Semiconductors product can reasonably be expected

to result in personal injury, death or severe property or environmental

damage. NXP Semiconductors and its suppliers accept no liability for

inclusion and/or use of NXP Semiconductors products in such equipment or

applications and therefore such inclusion and/or use is at the customer’s own

risk.

Applications

 — Applications that are described herein for any of these

products are for illustrative purposes only. NXP Semiconductors makes

no representation or warranty that such applications will be suitable

for the specified use without further testing or modification. Customers

are responsible for the design and operation of their applications and

products using NXP Semiconductors products, and NXP Semiconductors

accepts no liability for any assistance with applications or customer product

design. It is customer’s sole responsibility to determine whether the NXP

Semiconductors product is suitable and fit for the customer’s applications

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 applications or products, or

the application or use by customer’s third party customer(s). Customer is

responsible for doing all necessary testing for the customer’s applications

and products using NXP Semiconductors products in order to avoid a

default of the applications and the products or of the application or use by

customer’s third party customer(s). NXP does not accept any liability in this

respect.

Export control

 — This document as well as the item(s) described herein

may be subject to export control regulations. Export might require a prior

authorization from competent authorities.

Evaluation products

 — This product is provided on an “as is” and “with all

faults” basis for evaluation purposes only. NXP Semiconductors, its affiliates

and their suppliers expressly disclaim all warranties, whether express,

implied or statutory, including but not limited to the implied warranties of

non-infringement, merchantability and fitness for a particular purpose. The

entire risk as to the quality, or arising out of the use or performance, of this

product remains with customer. In no event shall NXP Semiconductors, its

affiliates or their suppliers be liable to customer for any special, indirect,

consequential, punitive or incidental damages (including without limitation

damages for loss of business, business interruption, loss of use, loss of

data or information, and the like) arising out the use of or inability to use

the product, whether or not based on tort (including negligence), strict

liability, breach of contract, breach of warranty or any other theory, even if

advised of the possibility of such damages. Notwithstanding any damages

that customer might incur for any reason whatsoever (including without

limitation, all damages referenced above and all direct or general damages),

the entire liability of NXP Semiconductors, its affiliates and their suppliers

and customer’s exclusive remedy for all of the foregoing shall be limited to

actual damages incurred by customer based on reasonable reliance up to

the greater of the amount actually paid by customer for the product or five

dollars (US$5.00). The foregoing limitations, exclusions and disclaimers

shall apply to the maximum extent permitted by applicable law, even if any

remedy fails of its essential purpose.

Translations

 — A non-English (translated) version of a document is for

reference only. The English version shall prevail in case of any discrepancy

between the translated and English versions.

Security 

 — While NXP Semiconductors has implemented advanced

security features, all products may be subject to unidentified vulnerabilities.

Customers are responsible for the design and operation of their applications

and products to reduce the effect of these vulnerabilities on customer’s

applications and products, and NXP Semiconductors accepts no liability for

any vulnerability that is discovered. Customers should implement appropriate

design and operating safeguards to minimize the risks associated with their

applications and products.

7.3  Trademarks

Notice: All referenced brands, product names, service names and

trademarks are the property of their respective owners.

NXP

 — wordmark and logo are trademarks of NXP B.V.

Summary of Contents for OM11059UL

Page 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 ...

Page 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 ...

Page 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 ...

Page 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...

Page 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 ...

Page 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 ...

Page 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...

Page 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 ...

Page 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 ...

Page 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...

Page 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 ...

Page 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 ...

Page 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...

Page 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 ...

Page 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...

Page 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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