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PCF85263ATL/A Datasheet(PDF) 99 Page - NXP Semiconductors |
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PCF85263ATL/A Datasheet(HTML) 99 Page - NXP Semiconductors |
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99 / 100 page  PCF85263A All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2015. All rights reserved. Product data sheet Rev. 4.1 — 27 November 2015 99 of 100 continued >> NXP Semiconductors PCF85263A Tiny RTC with alarm, battery switch-over, and I2C-bus 31. Contents 1 General description . . . . . . . . . . . . . . . . . . . . . . 1 2 Features and benefits . . . . . . . . . . . . . . . . . . . . 1 3 Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 4 Ordering information . . . . . . . . . . . . . . . . . . . . . 2 4.1 Ordering options . . . . . . . . . . . . . . . . . . . . . . . . 2 5 Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 6 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 3 7 Pinning information . . . . . . . . . . . . . . . . . . . . . . 4 7.1 Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 7.2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 6 8 Functional description . . . . . . . . . . . . . . . . . . . 7 8.1 Registers organization overview. . . . . . . . . . . . 8 8.1.1 Time mode registers . . . . . . . . . . . . . . . . . . . . . 8 8.1.1.1 RTC mode time registers overview (RTCM = 0) 9 8.1.1.2 Stop-watch mode time registers (RTCM = 1) . 11 8.1.2 Control registers overview . . . . . . . . . . . . . . . 13 8.2 RTC mode time and date registers. . . . . . . . . 14 8.2.1 Definition of BCD . . . . . . . . . . . . . . . . . . . . . . 14 8.2.2 OS: Oscillator stop . . . . . . . . . . . . . . . . . . . . . 15 8.2.3 EMON: event monitor . . . . . . . . . . . . . . . . . . . 15 8.2.4 Definition of weekdays . . . . . . . . . . . . . . . . . . 16 8.2.5 Definition of months . . . . . . . . . . . . . . . . . . . . 16 8.2.6 Setting and reading the time in RTC mode. . . 17 8.3 Stop-watch mode time registers . . . . . . . . . . . 18 8.3.1 Setting and reading the time in stop-watch mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 8.4 Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 8.4.1 Alarms in RTC mode . . . . . . . . . . . . . . . . . . . 19 8.4.1.1 Alarm1 and alarm2 registers in RTC mode . . 19 8.4.1.2 Alarm1 and alarm2 control in RTC mode . . . . 20 8.4.1.3 Alarm1 and alarm2 function in RTC mode . . . 21 8.4.2 Alarms in stop-watch mode . . . . . . . . . . . . . . 23 8.4.2.1 Alarm1 and alarm2 registers in stop-watch mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 8.4.2.2 Alarm1 and alarm2 control in stop-watch mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 8.4.2.3 Alarm1 and alarm2 function in stop-watch mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 8.4.3 Alarm interrupts . . . . . . . . . . . . . . . . . . . . . . . 25 8.5 WatchDog . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 8.5.1 WatchDog functions . . . . . . . . . . . . . . . . . . . . 26 8.5.1.1 WatchDog repeat mode . . . . . . . . . . . . . . . . . 27 8.5.1.2 WatchDog single shot mode. . . . . . . . . . . . . . 27 8.5.1.3 WatchDog interrupts . . . . . . . . . . . . . . . . . . . 28 8.6 RAM byte . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 8.7 Timestamps . . . . . . . . . . . . . . . . . . . . . . . . . . 28 8.7.1 Timestamps interrupts . . . . . . . . . . . . . . . . . . 33 8.8 Offset register . . . . . . . . . . . . . . . . . . . . . . . . 34 8.8.1 Correction when OFFM = 0 . . . . . . . . . . . . . . 35 8.8.2 Correction when OFFM = 1 . . . . . . . . . . . . . . 35 8.8.3 Offset calibration workflow . . . . . . . . . . . . . . . 37 8.8.4 Offset interrupts . . . . . . . . . . . . . . . . . . . . . . . 38 8.9 Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 8.9.1 ILPA/ILPB: interrupt level or pulse mode . . . . 39 8.9.2 Interrupt enable bits . . . . . . . . . . . . . . . . . . . . 40 8.10 Oscillator register . . . . . . . . . . . . . . . . . . . . . . 42 8.10.1 CLKIV: invert the clock output . . . . . . . . . . . . 42 8.10.2 OFFM: offset calibration mode. . . . . . . . . . . . 42 8.10.3 12_24: 12 hour or 24 hour clock . . . . . . . . . . 42 8.10.4 LOWJ: low jitter mode . . . . . . . . . . . . . . . . . . 42 8.10.5 OSCD[1:0]: quartz oscillator drive control . . . 43 8.10.6 CL[1:0]: quartz oscillator load capacitance . . 43 8.11 Battery switch register . . . . . . . . . . . . . . . . . . 44 8.11.1 BSOFF: battery switch on/off control . . . . . . . 44 8.11.2 BSRR: battery switch internal refresh rate. . . 45 8.11.3 BSM[1:0]: battery switch mode . . . . . . . . . . . 45 8.11.3.1 Switching at the Vth level, BSM[1:0] = 00. . . . 46 8.11.3.2 Switching at the VBAT level, BSM[1:0] = 01 . . 47 8.11.3.3 Switching at the higher of VBAT or Vth level, BSM[1:0] = 10 . . . . . . . . . . . . . . . . . . . . . . . . 48 8.11.3.4 Switching at the lower of VBAT and Vth level, BSM[1:0] = 11 . . . . . . . . . . . . . . . . . . . . . . . . 49 8.11.4 BSTH: threshold voltage control . . . . . . . . . . 49 8.11.5 Battery switch interrupts . . . . . . . . . . . . . . . . 49 8.12 Pin_IO register . . . . . . . . . . . . . . . . . . . . . . . . 50 8.12.1 CLKPM: CLK pin mode control . . . . . . . . . . . 50 8.12.2 TSPULL: TS pin pull-up resistor value. . . . . . 50 8.12.3 TSL: TS pin level sense . . . . . . . . . . . . . . . . . 51 8.12.4 TSPM[1:0]: TS pin I/O control . . . . . . . . . . . . 51 8.12.4.1 TS pin output mode; INTB . . . . . . . . . . . . . . . 51 8.12.4.2 TS pin output mode; CLK. . . . . . . . . . . . . . . . 52 8.12.4.3 TS pin disabled . . . . . . . . . . . . . . . . . . . . . . . 52 8.12.5 TSIM: TS pin input type control . . . . . . . . . . . 52 8.12.5.1 TS pin input mode . . . . . . . . . . . . . . . . . . . . . 52 8.12.6 INTAPM[1:0]: INTA pin mode control . . . . . . . 52 8.12.6.1 INTAPM[1:0]: INTA. . . . . . . . . . . . . . . . . . . . . 53 8.12.6.2 INTAPM[1:0]: clock data. . . . . . . . . . . . . . . . . 53 8.12.6.3 INTAPM[1:0]: battery mode indication . . . . . . 53 8.13 Function register . . . . . . . . . . . . . . . . . . . . . . 54 8.13.1 100TH: 100th seconds mode. . . . . . . . . . . . . 54 8.13.2 PI[1:0]: Periodic interrupt . . . . . . . . . . . . . . . . 54 8.13.3 RTCM: RTC mode . . . . . . . . . . . . . . . . . . . . . 55 8.13.4 STOPM: STOP mode control. . . . . . . . . . . . . 55 8.13.5 COF[2:0]: Clock output frequency . . . . . . . . . 56 |
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