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PCF8523U/12AA/1 Datasheet(PDF) 42 Page - NXP Semiconductors

Part # PCF8523U/12AA/1
Description  Real-Time Clock (RTC) and calendar
PDF  75 Pages
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Manufacturer  NXP [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo NXP - NXP Semiconductors

PCF8523U/12AA/1 Datasheet(HTML) 42 Page - NXP Semiconductors

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PCF8523
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2012. All rights reserved.
Product data sheet
Rev. 4 — 5 July 2012
42 of 74
NXP Semiconductors
PCF8523
Real-Time Clock (RTC) and calendar
(1) Indicates normal duration of INT1 pulse.
The timing shown for clearing CTAF is also valid for the non-pulsed interrupt mode, that is, when
TAM set logic 0, where the INT1 pulse may be shortened by setting CTAIE logic 0.
Fig 25. Example of shortening the INT1 pulse by clearing the CTAF flag
013aaa334
01
countdown counter
CDTF
INT1
SCL
instruction
n
CLEAR INSTRUCTION
(1)



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