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PCF85263ATL/A Datasheet(PDF) 57 Page - NXP Semiconductors |
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PCF85263ATL/A Datasheet(HTML) 57 Page - NXP Semiconductors |
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57 / 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 57 of 100 NXP Semiconductors PCF85263A Tiny RTC with alarm, battery switch-over, and I2C-bus 8.14 Flags register [1] Default value. The flags are set by their respective function. A full description can be found there. All flags behave the same way. They are set by some function of the IC and remain set until overwritten by command. It is possible to clear flags individually. To prevent one flag being overwritten while clearing another, a logic AND is performed during a write access. All flags are combined to generate an event monitoring signal called EMON. EMON is described in Section 8.2.3 on page 15 and can be read as the MSB of minutes register. Table 60. Flags - Flag status register (address 2Bh) bit description Bit Symbol Flag name Value Description 7 PIF Periodic Interrupt Flag Section 8.13.2 on page 54 0[1] read: periodic interrupt flag inactive write: periodic interrupt flag is cleared 1 read: periodic interrupt flag active write: periodic interrupt flag remains unchanged 6 A2F Alarm2 Flag Section 8.4 on page 19 0[1] read: alarm2 flag inactive write: alarm2 flag is cleared 1 read: alarm2 flag active write: alarm2 flag remains unchanged 5 A1F Alarm1 Flag Section 8.4 on page 19 0[1] read: alarm1 flag inactive write: alarm1 flag is cleared 1 read: alarm1 flag active write: alarm1 flag remains unchanged 4 WDF WatchDog Flag Section 8.5 on page 26 0[1] read: WatchDog flag inactive write: WatchDog flag is cleared 1 read: WatchDog flag active write: WatchDog flag remains unchanged 3 BSF Battery Switch Flag Section 8.11 on page 44 0[1] read: battery switch flag inactive write: battery switch flag is cleared 1 read: battery switch flag active write: battery switch flag remains unchanged 2TSR13F Timestamp Register 3 event Flag Section 8.7 on page 28 0[1] read: timestamp register 3 flag inactive write: timestamp register 3 flag is cleared 1 read: timestamp register 3 flag active write: timestamp register 3 flag remains unchanged 1 TSR2F Timestamp Register 2 event Flag Section 8.7 on page 28 0[1] read: timestamp register 2 flag inactive write: timestamp register 2 flag is cleared 1 read: timestamp register 2 flag active write: timestamp register 2 flag remains unchanged 0 TSR1F Timestamp Register 1 event Flag Section 8.7 on page 28 0[1] read: timestamp register 1 flag inactive write: timestamp register 1 flag is cleared 1 read: timestamp register 1 flag active write: timestamp register 1 flag remains unchanged |
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