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PCF8523 Datasheet(PDF) 26 Page - NXP Semiconductors |
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PCF8523 Datasheet(HTML) 26 Page - NXP Semiconductors |
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26 / 66 page  PCF8523 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved. Product data sheet Rev. 3 — 30 March 2011 26 of 66 NXP Semiconductors PCF8523 Real-Time Clock (RTC) and calendar 8.7.6 Alarm interrupts Generation of interrupts from the alarm function is controlled via the bit AIE (register Control_1). If AIE is enabled, the INT1 will follow the status of bit AF (register Control_2). Clearing AF will immediately clear INT1. No pulse generation is possible for alarm interrupts. Example where only the minute alarm is used and no other interrupts are enabled. Fig 17. AF timing 013aaa335 44 45 minute counter minute alarm AF INT1 SCL instruction 45 CLEAR INSTRUCTION |
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