| Specifications | PCF8523 Real-Time Clock \RTC\ and calendar NXP Semiconductors |
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| Specifications | PCF8523 Real-Time Clock \RTC\ and calendar NXP Semiconductors |
| Business section |
| Specifications | PCF8523 Real-Time Clock \RTC\ and calendar NXP Semiconductors |
| Outline | 1. General description 2. Features and benefits 3. Applications 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 7.1 Pinning 7.2 Pin description 4. Ordering information 5. Marking 6. Block diagram 7. Pinning information 8. Functional description 9. Internal circuitry 10. Limiting values 11. Static characteristics 12. Dynamic characteristics 13. Application information 14. Package outline 15. Bare die outline 16. Handling information 17. Packing information 18. Soldering of SMD packages 19. Abbreviations 20. References 21. Revision history 22. Legal information 23. Contact information 24. Contents |
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| Content | NXP SemiconductorsPCF8523 Real-Time Clock (RTC) and calendar © NXP B.V.2011.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: 30 March 2011 Document identifier: PCF8523 Please be aware that important notices concerning this document and the product(s) described herein, have been included in section ‘Legal information’. 24. Contents 1 General description. . . . . . . . . . . . . . . . . . . . . . 1 2 Features and benefits . . . . . . . . . . . . . . . . . . . . 1 3 Applications. . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 4 Ordering information. . . . . . . . . . . . . . . . . . . . . 2 5 Marking. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 6 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 3 7 Pinning information. . . . . . . . . . . . . . . . . . . . . . 4 7.1 Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 7.2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 5 8 Functional description . . . . . . . . . . . . . . . . . . . 6 8.1 Register overview. . . . . . . . . . . . . . . . . . . . . . . 7 8.2 Control and status registers . . . . . . . . . . . . . . . 8 8.2.1 Register Control_1 . . . . . . . . . . . . . . . . . . . . . . 8 8.2.2 Register Control_2 . . . . . . . . . . . . . . . . . . . . . . 9 8.2.3 Register Control_3 . . . . . . . . . . . . . . . . . . . . . 10 8.3 Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 8.4 Interrupt function. . . . . . . . . . . . . . . . . . . . . . . 12 8.5 Power management functions . . . . . . . . . . . . 14 8.5.1 Standby mode. . . . . . . . . . . . . . . . . . . . . . . . . 14 8.5.2 Battery switch-over function. . . . . . . . . . . . . . 15 8.5.2.1 Standard mode. . . . . . . . . . . . . . . . . . . . . . . . 16 8.5.2.2 Direct switching mode . . . . . . . . . . . . . . . . . . 17 8.5.2.3 Battery switch-over disabled, only one power supply (VDD). . . . . . . . . . . . . . . . . . . . . 17 8.5.3 Battery low detection function. . . . . . . . . . . . . 17 8.6 Time and date registers . . . . . . . . . . . . . . . . . 19 8.6.1 Register Seconds. . . . . . . . . . . . . . . . . . . . . . 19 8.6.1.1 Oscillator stop flag . . . . . . . . . . . . . . . . . . . . . 19 8.6.2 Register Minutes. . . . . . . . . . . . . . . . . . . . . . . 20 8.6.3 Register Hours . . . . . . . . . . . . . . . . . . . . . . . . 20 8.6.4 Register Days. . . . . . . . . . . . . . . . . . . . . . . . . 20 8.6.5 Register Weekdays. . . . . . . . . . . . . . . . . . . . . 21 8.6.6 Register Months. . . . . . . . . . . . . . . . . . . . . . . 21 8.6.7 Register Years . . . . . . . . . . . . . . . . . . . . . . . . 22 8.6.8 Data flow of the time function. . . . . . . . . . . . . 22 8.7 Alarm registers. . . . . . . . . . . . . . . . . . . . . . . . 23 8.7.1 Register Minute_alarm. . . . . . . . . . . . . . . . . . 23 8.7.2 Register Hour_alarm . . . . . . . . . . . . . . . . . . . 23 8.7.3 Register Day_alarm . . . . . . . . . . . . . . . . . . . . 24 8.7.4 Register Weekday_alarm. . . . . . . . . . . . . . . . 24 8.7.5 Alarm flag. . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 8.7.6 Alarm interrupts . . . . . . . . . . . . . . . . . . . . . . . 26 8.8 Register Offset . . . . . . . . . . . . . . . . . . . . . . . . 27 8.8.1 Correction when MODE=0 . . . . . . . . . . . . . . 28 8.8.2 Correction when MODE=1 . . . . . . . . . . . . . . 28 8.9 Timer function. . . . . . . . . . . . . . . . . . . . . . . . . 30 8.9.1 Timer registers . . . . . . . . . . . . . . . . . . . . . . . . 30 8.9.1.1 Register Tmr_CLKOUT_ctrl and clock output 30 8.9.1.2 Register Tmr_A_freq_ctrl. . . . . . . . . . . . . . . . 31 8.9.1.3 Register Tmr_A_reg. . . . . . . . . . . . . . . . . . . . 32 8.9.1.4 Register Tmr_B_freq_ctrl. . . . . . . . . . . . . . . . 32 8.9.1.5 Register Tmr_B_reg . . . . . . . . . . . . . . . . . . . 32 8.9.1.6 Programmable timer characteristics . . . . . . . 33 8.9.2 Timer A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 8.9.2.1 Watchdog timer function . . . . . . . . . . . . . . . . 33 8.9.2.2 Countdown timer function . . . . . . . . . . . . . . . 34 8.9.3 Timer B. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 8.9.4 Second interrupt timer . . . . . . . . . . . . . . . . . . 37 8.9.5 Timer interrupt pulse . . . . . . . . . . . . . . . . . . . 38 8.10 STOP bit function. . . . . . . . . . . . . . . . . . . . . . 41 8.11 I2C-bus interface . . . . . . . . . . . . . . . . . . . . . . 43 8.11.1 Bit transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 8.11.2 START and STOP conditions. . . . . . . . . . . . . 43 8.11.3 System configuration. . . . . . . . . . . . . . . . . . . 43 8.11.4 Acknowledge . . . . . . . . . . . . . . . . . . . . . . . . . 44 8.11.5 I2C-bus protocol. . . . . . . . . . . . . . . . . . . . . . . 45 9 Internal circuitry . . . . . . . . . . . . . . . . . . . . . . . 46 10 Limiting values . . . . . . . . . . . . . . . . . . . . . . . . 47 11 Static characteristics . . . . . . . . . . . . . . . . . . . 48 12 Dynamic characteristics. . . . . . . . . . . . . . . . . 50 13 Application information . . . . . . . . . . . . . . . . . 51 14 Package outline. . . . . . . . . . . . . . . . . . . . . . . . 52 15 Bare die outline. . . . . . . . . . . . . . . . . . . . . . . . 55 16 Handling information . . . . . . . . . . . . . . . . . . . 56 17 Packing information . . . . . . . . . . . . . . . . . . . . 57 18 Soldering of SMD packages. . . . . . . . . . . . . . 58 18.1 Introduction to soldering. . . . . . . . . . . . . . . . . 58 18.2 Wave and reflow soldering. . . . . . . . . . . . . . . 58 18.3 Wave soldering . . . . . . . . . . . . . . . . . . . . . . . 58 18.4 Reflow soldering . . . . . . . . . . . . . . . . . . . . . . 59 19 Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . 61 20 References. . . . . . . . . . . . . . . . . . . . . . . . . . . . 62 21 Revision history . . . . . . . . . . . . . . . . . . . . . . . 63 22 Legal information . . . . . . . . . . . . . . . . . . . . . . 64 22.1 Data sheet status. . . . . . . . . . . . . . . . . . . . . . 64 22.2 Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . 64 22.3 Disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . 64 22.4 Trademarks . . . . . . . . . . . . . . . . . . . . . . . . . . 65 23 Contact information . . . . . . . . . . . . . . . . . . . . 65 24 Contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66 |
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