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PCF85263ATL/A Datasheet(PDF) 23 Page - NXP Semiconductors |
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PCF85263ATL/A Datasheet(HTML) 23 Page - NXP Semiconductors |
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23 / 102 page  NXP Semiconductors PCF85263A Tiny RTC/Calendar with Alarm Function, Battery Switch-Over, Time Stamp Input, and I2C-bus 7.4.2.1 Alarm1 and alarm2 registers in stop-watch mode Setting the time for alarm1 and alarm2: Only the relevant information for the alarm condition has to be programmed. The unused parts are ignored. Bit positions labeled as - are not implemented. Upper-digit (ten’s place) Digit (unit place) Address Register name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Stop-watch alarm1 registers 08h Second_alm1 - 0 to 5 0 to 9 09h Minute_alm1 - 0 to 5 0 to 9 09h Hr_xx_xx_00_alm1 0 to 9 0 to 9 0Bh Hr_xx_00_xx_alm1 0 to 9 0 to 9 0Ch Hr_00_xx_xx_alm1 0 to 9 0 to 9 Stop-watch alarm2 registers 0Dh Minute_alm2 - 0 to 5 0 to 9 0Eh Hr_xx_00_alm2 0 to 9 0 to 9 0Fh Hr_00_xx_alm2 0 to 9 0 to 9 Table 14. Alarm1 and alarm2 registers in stop-watch mode coded in BCD (RTCM = 1) 7.4.2.2 Alarm1 and alarm2 control in stop-watch mode Bit Symbol Value Description Stop-watch alarm2 Thousands of hours alarm2 enable 0 [1] Disabled 7 HR_00_XX_A2E 1 Enabled Tens of hours alarm2 enable 0 [1] Disabled 6 HR_XX_00_A2E 1 Enabled Minute alarm2 enable 0 [1] Disabled 5 MIN_A2E 1 Enabled Stop-watch alarm1 100 thousands of hours alarm1 enable 0 [1] Disabled 4 HR_00_XX_XX_A1E 1 Enabled Thousands of hours alarm1 enable 0 [1] Disabled 3 HR_XX_00_XX_A1E 1 Enabled Table 15. Alarm_enables- alarm enable control register (address 10h) bit description PCF85263A All information provided in this document is subject to legal disclaimers. © 2025 NXP B.V. All rights reserved. Product data sheet Rev. 5.4 — 12 December 2025 Document feedback 23 / 102 |
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