PCA2129TSLASHQ900SLASH2 datasheet(45/84 Pages) NXP

Part #	PCA2129T/Q900/2

Description	Automotive accurate RTC with integrated quartz crystal

PDF	84 Pages

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Manufacturer	NXP [NXP Semiconductors]

Direct Link	http://www.nxp.com

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PCA2129

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Product data sheet

Rev. 5 — 19 December 2014

45 of 84

NXP Semiconductors

PCA2129

Automotive accurate RTC with integrated quartz crystal

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 20. Interrupt block diagram

PCA2129T/Q900/2 Datasheet(PDF) 45 Page - NXP Semiconductors