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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 / 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 23 of 100 NXP Semiconductors PCF85263A Tiny RTC with alarm, battery switch-over, and I2C-bus 8.4.2 Alarms in stop-watch mode In stop-watch mode, Alarm 1 can be configured from seconds to 999999 hours. Alarm 2 operates on minutes up to 9999 hours. 8.4.2.1 Alarm1 and alarm2 registers in stop-watch mode Setting the time for alarm1 and alarm2: Only the information which is relevant for the alarm condition must to be programmed. The unused parts are ignored. 8.4.2.2 Alarm1 and alarm2 control in stop-watch mode Table 15. Alarm1 and alarm2 registers in stop-watch mode coded in BCD (RTCM = 1) Bit positions labeled as - are not implemented. Address Register name Upper-digit (ten’s place) Digit (unit place) 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 16. Alarm_enables- alarm enable control register (address 10h) bit description Bit Symbol Value Description Stop-watch alarm2 7 HR_00_XX_A2E thousands of hours alarm2 enable 0[1] disabled 1 enabled 6 HR_XX_00_A2E tens of hours alarm2 enable 0[1] disabled 1 enabled 5 MIN_A2E minute alarm2 enable 0[1] disabled 1 enabled Stop-watch alarm1 4 HR_00_XX_XX_A1E 100 thousands of hours alarm1 enable 0[1] disabled 1 enabled 3 HR_XX_00_XX_A1E thousands of hours alarm1 enable 0[1] disabled 1 enabled |
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