PC8523-1(2012) 查看數據表（PDF） - NXP Semiconductors.

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PC8523-1
(Rev.:2012)

Real-Time Clock (RTC) and calendar

NXP Semiconductors. 

NXP Semiconductors

PCF8523

Real-Time Clock (RTC) and calendar

8.5.2.1 Standard mode

If VDD > VBAT OR VDD > Vth(sw)bat, the internal power supply is VDD.

If VDD < VBAT AND VDD < Vth(sw)bat, the internal power supply is VBAT.

backup battery operation

VDD

VBBS

VBAT

internal power supply (= VBBS)

VBBS

Vth(sw)bat

(= 2.5 V)

VDD (= 0 V)

BSF

INT1

cleared via interface

013aaa321

Fig 9. Battery switch-over behavior in standard mode and with bit BSIE set logic 1

(enabled)

PCF8523

Product data sheet

All information provided in this document is subject to legal disclaimers.

Rev. 4 — 5 July 2012

© NXP B.V. 2012. All rights reserved.

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