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PCF85263ATL/A Datasheet(PDF) 55 Page - NXP Semiconductors |
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PCF85263ATL/A Datasheet(HTML) 55 Page - NXP Semiconductors |
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55 / 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 55 of 100 NXP Semiconductors PCF85263A Tiny RTC with alarm, battery switch-over, and I2C-bus 8.13.3 RTCM: RTC mode [1] Default value. The RTC mode is used to control how the time is counted. When configured as a classic RTC, then time is counted from 100th seconds to years. In stop-watch mode, time is counted from 100th seconds to 999999 hours. [1] Enabled with 100TH bit in the Function register (Section 8.13 on page 54). 8.13.4 STOPM: STOP mode control [1] Default value. The STOP register bit in the Oscillator register (Section 8.10 on page 42) is used to stop the counting of time in both RTC mode and stop-watch mode. Stopping of the oscillator can also be controlled from the TS pin. The TS pin must first be configured as an input by the TSPM[1:0] bits, then selected for active HIGH or active LOW by the TSL bits. [1] In the Oscillator register (Section 8.10 on page 42). [2] TSPM[1:0] = 11. Table 54. RTCM bit - Function control register (address 28h) Bit Symbol Value Description 4RTCM RTC mode 0[1] real-time clock mode 1 stop-watch mode Table 55. RTC time counting modes RTCM Mode Time counting 0 RTC 100th seconds[1], seconds, minutes, hours, days, weekdays, months, years 1 stop-watch 100th seconds[1], seconds, minutes, hours (0 hours to 999999 hours) Table 56. STOPM bit - Function control register (address 28h) Bit Symbol Value Description 3STOPM STOP mode 0[1] RTC stop is controlled by STOP bit only 1 RTC stop is controlled by STOP bit or TS pin Table 57. Oscillator stop control when STOPM = 1 STOP bit[1] TSL TS pin[2] Oscillator state Description 0 0 0 running TS pin active HIGH 1 stopped 1 0 stopped TS pin active LOW 1 running 1 - - stopped TS pin ignored |
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