UM10762 User manual for the accurate RTC demo board OM13513
Contents
1. UM10762 1 2 3 4 5 6 PCF2127T Accurate RTC with integrated quartz crystal for industrial PCA2129T Accurate RTC with integrated quartz crystal for automotive data sheet PCF2129AT Integrated RTC TCXO and quartz crystal AN11266 Application and soldering information for the PCF2127T industrial TCXO RTC Application note AN10857 Application and soldering information for PCF2127A and PCF2129A TCXO RTC AN11120 Application and soldering information for the PCA2129 automotive TCXO RTC All information provided in this document is subject to legal disclaimers NXP Semiconductors N V 2014 All rights reserved User manual Rev 2 1 September 2014 16 of 20 NXP Semiconductors UM10762 RTC PCF2127T PCF2129AT evaluation board OM13513 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 as2. UM10762 User manual for the accurate RTC demo board OM13513 containing PCF2127T and PCF2129AT Rev 2 1 September 2014 User manual Document information Info Content Keywords PCF2127T PCF2129AT OM13513 accurate RTC Real Time Clock get started SPI bus I C bus time stamp temperature compensation integrated quartz tuning battery switch Watch Dog Abstract User manual for the accurate RTC demo board OM13513 containing PCF2127T and PCF2129AT NXP Semiconductors UM10762 Revision history RTC PCF2127T PCF2129AT evaluation board OM13513 Rev Date Description v 2 20140901 updated revision v 1 20140602 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 UM10762 All information provided in this document is subject to legal disclaimers NXP Semiconductors N V 2014 All rights reserved User manual Rev 2 1 September 2014 2 of 20 NXP Semiconductors U M1 0762 RTC PCF2127T PCF2129AT evaluation board OM13513 1 Introduction The PCF2127 PCA2129 and PCF2129 are a family of very accurate Real Time Clocks They feature a fully integrated temperature compensated quartz oscillator TCXO Time stamp battery management and watchdog blocks reduce the system overhead considerably The OM13513 is the ideal evaluation and
3. can be done to compensate for aging or to set purposely an offset to the nominal frequency Just program the register 19h accordingly All information provided in this document is subject to legal disclaimers NXP Semiconductors N V 2014 All rights reserved User manual Rev 2 1 September 2014 14 of 20 NXP Semiconductors U M1 0762 RTC PCF2127T PCF2129AT evaluation board OM13513 5 2 1 C bus software example Set time to 9 45 37 Aug 1 2014 Generate a blinking LED at the Seconds interrupt Table 3 1 C bus software example Address Value Function S START condition s A2h slave address R W 0 00h register address 00h Oth enable seconds interrupt Oih 00h default values 02h 00h default values 03h 37h set to 37 seconds 04h 45h set to 45 minutes 05h 09h set to 9 hours 06h Oth set to day 1 07h o5h set to Friday 08h 08h set to August 09h 14h set to year 14 P STOP condition S START condition A2h slave address RW 0 OFh register address OFh Oih set CLKOUT frequency to 16 kHz 10h 23h select pulsed interrupt signal P STOP condition UM10762 All information provided in this document is subject to legal disclaimers NXP Semiconductors N V 2014 All rights reserved User manual Rev 2 1 September 2014 15 of 20 NXP Semiconductors UM10762 6 References RTC PCF2127T PCF2129AT evaluation board OM13513
4. Outputs J interrupt output P2 K clock output P3 Push button L time stamp input 1 Ti M time stamp input 2 T1 E 1 In direction of reading Jn UM10762 All information provided in this document is subject to legal disclaimers NXP Semiconductors N V 2014 All rights reserved User manual Rev 2 1 September 2014 13 of 20 NXP Semiconductors U M1 0762 RTC PCF2127T PCF2129AT evaluation board OM13513 4 Optional features for test and evaluation 4 1 5 Software Experimental area Left of the NXP logo there is some space on the board where a custom circuitry can be placed Vss and Vpp are available for easy set up UM10762 5 1 The accurate RTC is controlled via a standard SPl bus or an FM C bus interface Common protocols apply After power up the control register has to be programmed first to set the correct functions and modes Then the current time should be programmed Software instructions for setting the clock Configuring the function Control registers 00h to 02h Setting the time Time and date registers 03h to 09h Programming alarms Alarm registers OAh to OEh Clock out control Register OFh Watchdog Registers 10h 11h Time stamp Registers 12h to18h Aging compensation Register 19h RAM PCF2127 only Registers 1Ah to 1Dh Frequency trimming Since the oscillator is factory calibrated there is no need for trimming Optional trimming
5. the actual deviations at different temperatures may be positive running to fast or negative running too slow they may cancel out each other to a high extend Therefore the actual accuracy over timer is much better than specified in with the max values lt 3 ppm or 1 s 4days can be expected Other consideration regard the ambient temperature over the day respectively over the year Temperatures below e g 15 C and above 60 C are usually only present for a limited time of the day and may even not be present most of the year All information provided in this document is subject to legal disclaimers NXP Semiconductors N V 2014 All rights reserved User manual Rev 2 1 September 2014 6 of 20 NXP Semiconductors UM10762 UM10762 RTC PCF2127T PCF2129AT evaluation board OM13513 Jaai 40 001aaj650 Frequency stability ppm 10 ppm 5 ppm 10 ppm Al E ee oe eed One eS ele ka E i 0 a 40 PCF2127AT PCF2129AT 2 80 40 20 0 20 40 60 80 100 Temperature C 1 4 40 013aaa345 Frequency stability ppm ppm LRH 40 60 Fig 3 Temperature compensation gradation in respect to family 80 100 Temperature C All information provided in this document is subject to legal disclaimers NXP Semiconductors N V 2014 All rights
6. 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 system
7. F2129AT evaluation board OM13513 3 4 2 Settings for PCF2129AT IC1 Default jumper settings to operate PCF2129AT and disable PCF2127T on the board The hardware settings are illustrated in Figure 6 SND YDD 4 SDAZCEN2 Pa E SDAVCEnt S SSesesesese SSSsesesesse SSsSsssseses E TSE TWO C U 9p id N s N 60 D j N N N N m Oo m d a w am D pa a Fig 6 Hardware settings for PCF2129AT UM10762 All information provided in this document is subject to legal disclaimers NXP Semiconductors N V 2014 All rights reserved User manual Rev 2 1 September 2014 10 of 20 NXP Semiconductors UM10762 RTC PCF2127T PCF2129AT evaluation board OM13513 Table 1 Jumper settings to operate PCF2129AT IC1 Indicator Description Jumper Setting Jumpers A Vpp selected for PCF2129AT J1 CL B battery backup of PCF2129AT enabled J6 nu C battery backup of PCF2127T disabled J5 CE D LED D1 connected to interrupt pin JP4 nn E 12C bus selected for the PCF2129AT J4 T SPl bus selected for the PCF2129AT nu G unused SDl interface connected to GND JP1 nu H pull up on CLKOUT JP2 Interface l supply and interface connector P2 Outputs J interrupt output P2 K clock output P3 1 In direction of reading Jn UM10762 All i
8. TC are complementing the main functionality PCF2127T and PCF2129AT e Temperature compensated quartz oscillator TCXO with embedded quartz crystal Typical accuracy 3 ppm e Battery backup input pin and switch over circuitry e Battery backed output voltage e Universal interface to select between SPI and 1 C bus e Time stamp facility With interrupt capability Detection of two different events on one multilevel input pin for example for tamper detection e Programmable watchdog timer with interrupt UM10762 All information provided in this document is subject to legal disclaimers NXP Semiconductors N V 2014 All rights reserved User manual Rev 2 1 September 2014 4 of 20 NXP Semiconductors U M1 0762 RTC PCF2127T PCF2129AT evaluation board OM13513 e Programmable alarm function with interrupt capability In addition PCF2127T has the following features e 512 Byte of battery buffered RAM e Programmable countdown timer with interrupt e Additional power fail detector to for example pre alert the microcontroller that the power supply is going down The block diagram in Figure 2 nicely illustrates the key blocks e Time stamp facility e Temperature compensated quartz oscillator TCXO e Battery back up switch e Universal interface to select between SPl bus and I2C bus CLKOUT Battery out Vop CE SCL SDI SDO Interface select Vss Ta E Fig 2 Block diagram
9. ard OM13513 8 Tables Table 1 Jumper settings to operate PCF2129AT IC1 11 Table 2 Jumper settings to operate the PCF2127T IC2 13 Table 3 1 C bus software example 15 UM10762 All information provided in this document is subject to legal disclaimers NXP Semiconductors N V 2014 All rights reserved User manual Rev 2 1 September 2014 18 of 20 NXP Semiconductors U M1 0762 RTC PCF2127T PCF2129AT evaluation board OM13513 9 Figures Fig 1 OM13513 evaluation demo board 4 Fig 2 Block diagram of the accurate RTC family 5 Fig 3 Temperature compensation gradation in respect to TAMMY s hee na a iiag eon aug 8 ele edad og Ae me 7 Fig 4 Circuit diagram of the demo board OM13513 8 Fig 5 Evaluation board top side layout 9 Fig 6 Hardware settings for PCF2129AT 10 Fig 7 Hardware settings for PCF2127T 12 UM10762 All information provided in this document is subject to legal disclaimers NXP Semiconductors N V 2014 All rights reserved User manual Rev 2 1 September 2014 19 of 20 NXP Semiconductors UM10762 10 Contents RTC PCF2127T PCF2129AT evaluation board OM13513 1 Introduction 0 0c eee eee eee 2 Key featureS 00 e cece 2 1 Evaluation board OM13513 2 2 Accurate RIG eece 22 rea eee 2 3 Accurate Real Time Clock PCF2127T PCF2I129AT 22 seoir as ka PEAGE EE cloak
10. demo board to be used during the design phase of any project only power and a serial bus SPl bus or I2C bus need to be connected The OM13518 USB to I2C bus dongle could be used for the 1 C bus connection 2 Key features 2 1 Evaluation board OM13513 The accurate RTCs PCF2127T and PCF2129AT are mounted together with a back up lithium battery on a small PC board Two push buttons allow initiating time stamps All signals are accessible on the pin connectors P2 and P3 see Figure 4 overcoming the need to build a test PC board before the circuit can be evaluated or the functionality can be tested together with the final application The board is also helpful to evaluate the functionality of PCF2127AT PCF2129T and PCA2129T Q900 the automotive grade version Also check section Section 2 3 UM10762 All information provided in this document is subject to legal disclaimers NXP Semiconductors N V 2014 All rights reserved User manual Rev 2 1 September 2014 3 of 20 NXP Semiconductors U M1 0762 RTC PCF2127T PCF2129AT evaluation board OM13513 SND DD O DA ZCEN2 SDAZCEn1 EEEL ee ae ee e2ee089009 20 029 00009 29000009 f ogoood9d 109990000 U F ed N en N W D 4 N N N N OC m o D 7 E TSE TWO For configuring the board see Section 3 4 Fig 1 OM13513 evaluation demo board 2 2 Accurate RTC The specific features of the accurate R
11. ed 2 4 Expected accuracy 000e 3 Hardware setup ssasssannnnnnnnnnnne 3 1 Detailed circuit diagram 3 2 General requirements for the PCF2127T and PGF2129AT o n a ia dhe celia oan 3 3 Battery back up 00 ee ee eee 3 4 Hardware settings 00085 3 4 1 General settingS 0 e ee eee 3 4 2 Settings for PCF2129AT IC1 3 4 3 Settings for PCF2127T IC2 4 Optional features for test and evaluation 4 1 Experimental area 000000 5 Software ccrreprisis eas kiaui 5 1 Software instructions for setting the clock 5 1 1 Configuring the function 5 1 2 Setting the time nanana aana 5 1 3 Programming alarms 5 1 4 Clock out control 020000 5 1 5 Watchdog virpa ekute eee 5 1 6 Timestamp 2 24 eee a yee ee de kee Ae eo 5 1 7 Aging compensation 5 1 8 RAM PCF2127 only 005 5 1 9 Frequency trimming 5 2 I2C bus software example 6 References 2 0 00 c eee e cere eee eee 7 Legal information 00ee eee eee 7 1 Definitions ewe ee eee et eee deeds 7 2 Disclaimers 00000 0c eee eee 7 3 Trademarks 0 0 0 e eee eee eee 8 Tables irice eet enian redenta me 9 FIQUIGS rorirori naair eave EDE ees 10 Content rsen an n a a 14 Please be aware that important notice
12. nformation provided in this document is subject to legal disclaimers NXP Semiconductors N V 2014 All rights reserved User manual Rev 2 1 September 2014 11 of 20 NXP Semiconductors U M1 0762 RTC PCF2127T PCF2129AT evaluation board OM13513 3 4 3 Settings for PCF2127T IC2 Default jumper settings to operate PCF2127T and disable PCF2129AT on the board The hardware settings are illustrated in Figure 7 U 9P Ad N m N o D gt w N N N 4 O E 5 mt O W 3 oI 2 O W Fig 7 Hardware settings for PCF2127T UM10762 All information provided in this document is subject to legal disclaimers NXP Semiconductors N V 2014 All rights reserved User manual Rev 2 1 September 2014 12 of 20 NXP Semiconductors UM10762 RTC PCF2127T PCF2129AT evaluation board OM13513 Table 2 Jumper settings to operate the PCF2127T IC2 Indicator Description Jumper Setting Jumpers A Vpp selected for PCF2127T J2 EE B battery backup of PCF2127T enabled J5 EE C battery backup of PCF2129AT disabled J6 EE D LED D1 connected to interrupt pin JP4 an F I2C bus selected for the PCF2127T J7 an SPl bus selected for the PCF2127T an G unused SDI interface connected to GND JP1 EE H pull up on CLKOUT JP2 Interface l supply and interface connector P2
13. of the accurate RTC family 2 3 Accurate Real Time Clock PCF2127T PCF2129AT The high accuracy is achieved by the integration of a temperature compensated quartz oscillator including the quartz crystal in one package Additional features are battery management time stamp facility and in case of the PCF2127T additional 512 bytes of battery buffered RAM There are 3 different grades available 1 Temperature compensation covering 25 C to 65 C PCF2127AT PCF2129AT on the OM13513 UM10762 All information provided in this document is subject to legal disclaimers NXP Semiconductors N V 2014 All rights reserved User manual Rev 2 1 September 2014 5 of 20 NXP Semiconductors U M1 0762 UM10762 2 4 RTC PCF2127T PCF2129AT evaluation board OM13513 2 Temperature compensation covering 40 C to 85 C PCF2127T on the OM13513 PCF2129T 3 Automotive grade AEC Q100 covering 40 C to 85 C PCA2129T Q900 1 uses a quartz crystal packed in a metal can package 2 and 3 use a quartz packed in a ceramic package Expected accuracy The accuracy of an RTC is commonly specified in deviation of seconds per day or ppm 1 s day corresponds to 11 5ppm The PCF2127AT and PCF2129AT are temperature compensated over the temperature range of 30 C to 60 C and the PCF2127T PCF2129T and PCA2129T Q900 are temperature compensated over the temperature range of 40 C to 85 C see Figure 3 Since
14. ors N V 2014 All rights reserved User manual Rev 2 1 September 2014 8 of 20 NXP Semiconductors U M1 0762 RTC PCF2127T PCF2129AT evaluation board OM13513 3 3 Battery back up To guarantee the autonomy of the clock a continuous supply of power is needed The battery back up facility will assure this For storage and delivery the jumpers J5 and J6 are set such that the battery will not be discharged To reduce power consumption always switch off functions and outputs not in use 3 4 Hardware settings 3 4 1 General settings e Set Jumper JP4 to activate LED D1 for signaling an interrupt e The single in line connectors P2 and P3 100 mil pitch give access to all pins for integrating the RTC into an application e Resistor R1 and C1 reduce the Vpp slew rate when removing Vpp to ensure clean battery switch over e A Lithium coin cell battery 2032 is mounted underneath the board to buffer the voltage in case of loss of supply voltage Vpp e Jumper J1 respectively J2 allows to measure the current consumption replace it by a uA meter P13M14K11 ecoce GUvOEsOWSG 1L2ZI2 LYE6CIZ4ADd Fig 5 Evaluation board top side layout UM10762 All information provided in this document is subject to legal disclaimers NXP Semiconductors N V 2014 All rights reserved User manual Rev 2 1 September 2014 9 of 20 NXP Semiconductors U M1 0762 RTC PCF2127T PC
15. reserved User manual Rev 2 1 September 2014 7 of 20 NXP Semiconductors U M1 0762 RTC PCF2127T PCF2129AT evaluation board OM13513 3 Hardware setup 3 1 Detailed circuit diagram SDA CEn1 SDA CEn2 VDD U1 VDD U2 Ji J2 J3 J3 for futureise oe Optiond nn tor BBS VSS 100nF x 2 M2 Commet Fig 4 Circuit diagram of the demo board OM13513 The position of the jumpers and connectors can be found in the circuit diagram Figure 4 and the layout drawing Figure 5 3 2 General requirements for the PCF2127T and PCF2129AT The RTC circuit just requires a few external components to buffer the supply voltage Avoid any tracks with high frequency signals fast edges close to the RTC or its connections It is required to have a decoupling capacitor of 100 nF on the Vpp Vgsg rails close to the RTC a similar decoupling capacitor on pin BBS is required Due to the low power consumption of a few pW no precautions for heat dissipations are required even ina sealed housing environment Frequencies of 1 Hz to 16 884 kHz at the CLKOUT pin can be used to measure the frequency for calibration and or for general purpose use e g as reference for the frequency generation with a PLL If the CLKOUT frequency is set to 32 768 kHz then the accuracy may be less UM10762 All information provided in this document is subject to legal disclaimers NXP Semiconduct
16. s concerning this document and the product s described herein have been included in section Legal information NXP Semiconductors N V 2014 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 1 September 2014 Document identifier UM10762
17. s 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 UM10762 All information provided in this document is subject to legal disclaimers 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 rela
18. se 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 7 3 Trademarks Notice All referenced brands product names service names and trademarks are the property of their respective owners NXP Semiconductors N V 2014 All rights reserved User manual Rev 2 1 September 2014 17 of 20 NXP Semiconductors U M1 0762 RTC PCF2127T PCF2129AT evaluation bo
19. ted 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 u
Download Pdf Manuals
Related Search