UM10766 User manual for the I2C
Contents
1. I C bus RTCs PCF85063ATL and PCF85063TP OM11059A and UM10698 2 Key features 2 1 Demo board OM13510 The RTC PCF85263ATL with I C bus is mounted together with a quartz crystal a lithium battery plus the blocking capacitor buffering the supply voltage A push button allows activating the time stamp All signals are accessible on a line of pins overcoming the difficulties to contact the tiny package directly 2 2 Real time clock PCF85263A UM10766 Very small form factor leadless package DFN2626 10 for PCF85263ATL just 2 6 x 2 6 x 0 5 mm SO8 TSSOP8 and TSSOP10 packages will be released too Counting 100 seconds seconds minutes hours days week days month and years Three timestamp register sets Battery back up circuit accepting battery voltage larger or smaller than Vpop The oscillator is based on a 32 768 kHz quartz crystal Stop watch mode for elapsed time counting From 0 to 999 999 hours with a resolution of 1 100 second Two independent alarms WatchDog timer Two independent interrupt generators outputs Generates an interrupt automatically every second or every minute independent of alarm facility Programmable offset register for frequency adjustment to compensate quartz tolerance All information provided in this document is subject to legal disclaimers NXP B V 2016 All rights reserved User manual Rev 3 2 May 2016 3 of 14 NXP Semiconductors U M1 0766 User manual for the I2C bus2. RTC PCF85263A demo board OM13510 Quartz INT CLK INT Interface lC or SPI TS normally open or closed Fig 1 Block diagram of PCF85263A 3 Hardware set up 3 1 General requirement for the RTC PCF85263A The RTC circuit just requires one external part tuning fork quartz as resonator The oscillation capacitors are integrated and therefore there is no need for external capacitors The quartz 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 I C bus interface works up to 400 kHz Supply voltage 1 8 V to 5 5 V The RTC excluding the I C bus interface is however operating down to a lower voltage It is recommended to have a decoupling capacitor of 100 nF on the Vpp Vss rails close by Due to the low power consumption of below 1 uW no precautions for heat dissipations are required even in sealed housing environment Frequencies of 1 Hz to 32 768 kHz at CLKOUT can be used to measure the frequency for calibration and or be used for general purpose e g as reference for frequency generation with a PLL UM10766 All information provided in this document is subject to legal disclaimers NXP B V 2016 All rights reserved User manual Rev 3 2 May 2016 4 of 14 NXP Semiconductors U M1 0766 User manual for the I2C bus RTC PCF85263A demo board OM13
3. TOUNINO seenen 9 Frequency tuning sssssssessreeerreereerrerrrrerrrerren 9 PIOION ONCCS isena 11 Legal information cccccsseseeeeeeseesenseeeeeneeees 12 STO IS aaa a ATASA 12 DISCIAIMELS cccccecceecceeceeceeeeeeeeeeeeeeeeeeeeeeeeees 12 Trademarks ccveccatauiadcdsveoecdadavaadeotintentateitedeaderens 12 PISUOT MOQUICS 3 oscccscsesccssiccceseiccossanscecesceestaeceeccnnaes 13 CONTENTS aaa 14 Please be aware that important notices concerning this document and the product s described herein have been included in the section Legal information NXP B V 2016 All rights reserved For more information please visit http www nxp com For sales office addresses please send an email to salesaddresses nxp com Date of release 2 May 2016 Document identifier UM10766 Mouser Electronics Authorized Distributor Click to View Pricing Inventory Delivery amp Lifecycle Information NXP OM13510 598
4. 510 Quartz INT CLK Vop i INT 100nF Micro controller Vss INT Time stamp normally open or closed Fig 2 Interfacing to the microcontroller 3 2 Demo boards for OM13510 Top side 0M13510 Bottom side Pcres263 penopoarp Fig 3 PCF13263 Demo board OM13510 original version UM10766 All information provided in this document is subject to legal disclaimers NXP B V 2016 All rights reserved User manual Rev 3 2 May 2016 5 of 14 NXP Semiconductors U M1 0766 User manual for the I2C bus RTC PCF85263A demo board OM13510 2 O 0 0O O a aogGgaGagGaG age pi Beep 0O Poo0o 0o00 Re ee ee ogoogo 0M13510 PCF85263 E 013514 PCF85363 TTY Fig 4 PCF85263A Demo board OM13510 newer version UM10766 All information provided in this document is subject to legal disclaimers NXP B V 2016 All rights reserved User manual Rev 3 2 May 2016 6 of 14 NXP Semiconductors U M1 0766 User manual for the I2C bus RTC PCF85263A demo board OM13510 3 3 Out of the box Connect to e Hardware start up all pins are accessible on connector P2 GND and Vpop 3 V to 5 5 V Connect I C bus SDA SCL pull ups assumed on I C master board Optional Activate coin cell battery by setting Jumper J6 to VBT Connect interrupt s Connect CLK out After power up 32 kHz is th
5. UM10766 User manual for the I2C bus RTC PCF85263A demo board OM13510 Rev 3 2 May 2016 User manual Document information Info Content Keywords PCF85263 OM13510 demo board how to get started I C bus RTC Real Time Clock tuning time stamp battery switch elapsed time counter User manual for the RTC I2C bus demo board OM13510 which contains the PCF85263A Abstract NXP Semiconductors U M1 0766 User manual for the I2C bus RTC PCF85263A demo board OM13510 Revision history Rev Date Description v 3 20160502 Fig 4 Corrected ID mark v 2 20151103 Revised user manual v 1 20131115 new user manual first revision Contact information For more information please visit http www nxp com For sales office addresses please send an email to salesaddresses nxp com UM10766 All information provided in this document is subject to legal disclaimers NXP B V 2016 All rights reserved User manual Rev 3 2 May 2016 2 of 14 NXP Semiconductors U M1 0766 1 Introduction User manual for the I2C bus RTC PCF85263A demo board OM13510 The PCF85263A is part of the PCF85x63 family of CMOS Real Time Clocks RTCs optimized for low power consumption Different features sets are available The OM13510 is the ideal evaluation and demo board to be used in the design phase of any project just power and I C bus must be connected A separate dedicated demo board and a user manual is available for the
6. ault 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
7. cuit diagram INTAIVCLK INTA2 CLK VDD U1 5 BETI H e a E mam XTAL CM7V_TIA 2 1 GND XTAL_CM12 5V_TIA 2 1 M1 M2 Comment Comment Fig 5 PCF85263A Demo board OM13510 schematic for original board UM10766 All information provided in this document is subject to legal disclaimers NXP B V 2016 All rights reserved User manual Rev 3 2 May 2016 8 of 14 NXP Semiconductors U M1 0766 User manual for the I2C bus RTC PCF85263A demo board OM13510 NTAL CMV TIA oaa aa Fig 6 PCF85263A Demo board OM13510 schematic for newer board 4 2 Incorporate it with an application in development This board can be connected via connector P2 to the application to be developed 4 3 OM13510 in conjunction with the FM demo board OM13320 Connector P2 features the pinning of the universal FM demo board Next generation firmware will feature a GUI to control the RTC 5 RTC tuning 5 1 Frequency tuning The 32 kHz quartzes are typically sold with a tolerance at room temperature of either 20 ppm or 10 ppm 11 5 ppm corresponds to 1 s day The quartzes feature a characteristic load capacity of either 7 pF or 12 5 pF Oscillators utilizing 7 pF quartzes feature slightly lower power consumption where the quartzes of 12 5 pF have largest production quantities The tracks between quartz and RTC represent also some parasitic capacitances and must be kept short UM10766 Al
8. cument 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 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
9. e output to calibrate the oscillator or it may be used as reference frequency e Time stamp With TS push button a time stamp can be initiated The TS input must be configured for a mechanical switch therefore set the TSIM bit 1 e Software start up C bus address 1010 001R W Write oscillator calibration value register 24h Set parameters registers 25h to 2Bh Write actual time registers OOh to 07h Read current time registers OOh to O7h 3 4 Demo board features e Straight forward evaluation of the new tiny RTC PCF85263 with Battery back up 2 alarm facilities with 2 configurable interrupt outputs Time stamp Tracking time or stopwatch with 1 100 s resolution e Easy access to all pins despite of the tiny package Connector P2 100mil 2 54 mm pin pitch Access to all pins Battery on board for autonomous operation Can be switched off Interfacing with the FM development board OM13320 Connector P1 e Push bottom to trigger time stamp e Easy measurements of power consumption UM10766 All information provided in this document is subject to legal disclaimers NXP B V 2016 All rights reserved User manual Rev 3 2 May 2016 7 of 14 NXP Semiconductors U M1 0766 User manual for the I2C bus RTC PCF85263A demo board OM13510 Jumper J2 to open to link in uA meter e Future boards may include alternative packages 4 Circuit diagram 4 1 Demo board cir
10. l information provided in this document is subject to legal disclaimers NXP B V 2016 All rights reserved User manual Rev 3 2 May 2016 9 of 14 NXP Semiconductors U M1 0766 UM10766 User manual for the I2C bus RTC PCF85263A demo board OM13510 The PCF85263 has a tuning facility where tolerances can be compensated Tuning procedure e Measure the 32xxx Hz f signal at the CLKOUT pin e The offset is calculated in ppm as Affppm 10 x f 32768 32768 Consult the offset table in the data sheet Take the correction value and write it into the register 02h e The correction is done by means of inhibition or addition the oscillator runs at constant speed then every 2 hours mode 0 1 second is corrected by making it shorter or longer This is not easily visible at the CLKOUT Corrections can also be applied every 4 minutes by using mode 1 This mode will consume slightly more power The 32 kHz quartzes are of the type tuning fork and feature a parabolic frequency response over temperature When the application is dominantly used over a limited temperature range it is often helpful to tune the frequency to be slightly higher at the turn over point The error around 25 C clock goes too fast is then compensated during the time when temperature is lower or higher For example for operation between 5 C and 45 C tune the clock 8 ppm faster than the value for 25 C would be See Fig 7 frequency deviatio
11. n Afg ppm 1 Charactenstic if tuned to 32 768 kHz at 25 C 2 Charactenstic if tuned with the positive offset Af Fig 7 Temperature averaged over application range 5 C to 45 C All information provided in this document is subject to legal disclaimers NXP B V 2016 All rights reserved User manual Rev 3 2 May 2016 10 of 14 NXP Semiconductors U M1 0766 User manual for the I2C bus RTC PCF85263A demo board OM13510 6 References 1 AN11247 Improved timekeeping accuracy with PCF85063 PCF8523 and PCF2123 using an external temperature sensor 2 UM10301 User Manual for NXP Real Time Clocks PCF85x3 PCA8565 and PCF2123 PCA2125 UM10766 All information provided in this document is subject to legal disclaimers User manual Rev 3 2 May 2016 NXP B V 2016 All rights reserved 11 of 14 NXP Semiconductors UM10766 User manual for the I2C bus RTC PCF85263A demo board OM13510 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 do
12. 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 7 3 Trademarks Notice All referenced brands product names service names and trademarks are property of their respective owners NXP B V 2016 All rights reserved User manual Rev 3 2 May 2016 12 of 14 NXP Semiconductors U M1 0766 User manual for the I2C bus RTC PCF85263A demo board OM13510 8 List of figures Fig 1 Block diagram of PCF85263A cccccceeeeeees 4 Fig 2 Interfacing to the microcontroller 008 5 Fig 3 PCF13263 Demo board OM13510 original VESON os ects
13. secuasar eterna E 5 Fig 4 PCF85263A Demo board OM13510 newer 5 Eo 8 1 eee oe ore ene re eee 6 Fig 5 PCF85263A Demo board OM13510 schematic for Original board cccceeceeeseeeeeeeeeeeeaeeeeeeaees 8 Fig 6 PCF85263A Demo board OM13510 schematic for newer DOAMC cccecseeeceeeeeeeeaeeeeeeaeeeeeeaees 9 Fig 7 Temperature averaged over application range 5 C Oda Ourea o bene aotneesnedendednsndesectocctecee 10 UM10766 All information provided in this document is subject to legal disclaimers NXP B V 2016 All rights reserved User manual Rev 3 2 May 2016 13 of 14 NXP Semiconductors UM10766 User manual for the I2C bus RTC PCF85263A demo board OM13510 Contents introductori seessccciecsasauccenteceaecossencctenecetecsesanccenteees 3 K y features san 3 Demo board OM13510 ccccceeceseeeeseeeeeeeees 3 Real time clock PCF85263A ccccsecceeeeeeees 3 Hardware Set Up sssrinin 4 General requirement for the RTC PCF85263A 4 Demo boards for OM13510 ccccceeeeeeeeeeees 5 Out Of the DOX cceccceccceeeeseeeeeeeceeeeeeeeaeeeneeees 7 Demo board features cccccceeeeeeeeeeeeeeeeteees T Circuit diagr atii xe acasectcc acs seccecendeecseeesecuscoeececacenecee 8 Demo board Circuit diagram cccseeeeseeeeeees 8 Incorporate it with an application in development P E E EEE E E EN EE T 9 OM13510 in conjunction with the FM demo board OMT3320 sienio 9 RTO
14. 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 accepts 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 UM10766 All information provided in this document is subject to legal disclaimers 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 def
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