PCF2129 datasheet(45/86 Pages) PHILIPS

No de pièce	PCF2129

Description	Accurate RTC with integrated quartz crystal for industrial applications

PDF	86 Pages

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Fabricant	PHILIPS [NXP Semiconductors]

Site Internet	http://www.nxp.com

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PCF2129

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Product data sheet

Rev. 7 — 19 December 2014

45 of 86

NXP Semiconductors

PCF2129

Accurate RTC with integrated quartz crystal for industrial applications

8.12.1 Minute and second interrupts

Minute and second interrupts are generated by predefined timers. The timers can be

enabled independently from one another by the bits MI and SI in register Control_1.

However, a minute interrupt enabled on top of a second interrupt cannot be

distinguishable since it occurs at the same time.

The minute/second flag MSF (register Control_2) is set logic 1 when either the seconds or

the minutes counter increments according to the enabled interrupt (see Table 72). The

MSF flag can be cleared by command.

When SI, MI, WD_CD, AIE, TSIE, BIE, BLIE are all disabled, INT remains high-impedance.

Fig 21. Interrupt block diagram

PCF2129 Fiches technique(PDF) 45 Page - NXP Semiconductors