Datasheet

PCF8523 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2013. All rights reserved.
Product data sheet Rev. 6 — 17 September 2013 17 of 78
NXP Semiconductors
PCF8523
Real-Time Clock (RTC) and calendar
8.5.2.1 Standard mode
If V
DD
> V
BAT
OR V
DD
>V
th(sw)bat
, the internal power supply is V
DD
.
If V
DD
< V
BAT
AND V
DD
<V
th(sw)bat
, the internal power supply is V
BAT
.
Fig 9. Battery switch-over behavior in standard mode and with bit BSIE set logic 1
(enabled)
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