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PCA2129T/Q900/2 Datasheet(PDF) 53 Page - NXP Semiconductors

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
Logo NXP - NXP Semiconductors

PCA2129T/Q900/2 Datasheet(HTML) 53 Page - NXP Semiconductors

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PCA2129
All information provided in this document is subject to legal disclaimers.
© NXP Semiconductors N.V. 2014. All rights reserved.
Product data sheet
Rev. 5 — 19 December 2014
53 of 84
NXP Semiconductors
PCA2129
Automotive accurate RTC with integrated quartz crystal
In this example, the Seconds register is set to 45 seconds and the Minutes register to 10 minutes.
Fig 30. SPI-bus write example
In this example, the registers Months and Years are read. The pins SDI and SDO are not connected together. For this
configuration, it is important that pin SDI is never left floating. It must always be driven either HIGH or LOW. If pin SDI is left
open, high IDD currents may result.
Fig 31. SPI-bus read example



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