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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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PCF2129 데이터시트(PDF) 46 Page - NXP Semiconductors |
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PCF2129 데이터시트(HTML) 46 Page - NXP Semiconductors |
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46 / 86 page  PCF2129 All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2014. All rights reserved. Product data sheet Rev. 7 — 19 December 2014 46 of 86 NXP Semiconductors PCF2129 Accurate RTC with integrated quartz crystal for industrial applications When MSF is set logic 1: • If TI_TP is logic 1, the interrupt is generated as a pulsed signal. • If TI_TP is logic 0, the interrupt is permanently active signal that remains until MSF is cleared. Table 72. Effect of bits MI and SI on pin INT and bit MSF MI SI Result on INT Result on MSF 0 0 no interrupt generated MSF never set 1 0 an interrupt once per minute MSF set when minutes counter increments 0 1 an interrupt once per second MSF set when seconds counter increments 1 1 an interrupt once per second MSF set when seconds counter increments In this example, bit TI_TP is logic 1 and the MSF flag is not cleared after an interrupt. Fig 22. INT example for SI and MI when TI_TP is logic 1 In this example, bit TI_TP is logic 0 and the MSF flag is cleared after an interrupt. Fig 23. INT example for SI and MI when TI_TP is logic 0 |
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