PCF8563P datasheet(21/30 Pages) PHILIPS

номер детали	PCF8563P

подробное описание детали	Real-time clock/calendar

PDF	30 Pages

Scroll/Zoom	100%

производитель	PHILIPS [NXP Semiconductors]

домашняя страница	http://www.nxp.com

Logo

21 / 30 page

Philips Semiconductors

PCF8563

Real-time clock/calendar

Product speciﬁcation

16 April 1999

21 of 30

9397 750 04855

12. Application information

12.1 Quartz crystal frequency adjustment

Method 1: Fixed OSCI capacitor — By evaluating the average capacitance

necessary for the application layout a ﬁxed capacitor can be used. The frequency is

best measured via the 32.768 kHz signal available after power-on at the CLKOUT

pin. The frequency tolerance depends on the quartz crystal tolerance, the capacitor

tolerance and the device-to-device tolerance (on average

±5 × 10−6).

Average deviations of

±5 minutes per year can be easily achieved.

Method 2: OSCI trimmer — The oscillator is tuned to the required accuracy by

adjusting a trimmer capacitor on pin OSCI and measuring the 32.768 kHz signal

available after power-on at the CLKOUT pin.

Method 3: OSCO output — Direct output measurement on pin OSCO (accounting

for test probe capacitance).

Fig 19. Application diagram.

handbook, full pagewidth

MGM665

SCL

SDA

VSS

OSCI

OSCO

CLOCK CALENDAR

PCF8563

SDA

SCL

MASTER

TRANSMITTER/

RECEIVER

VDD

SDA

SCL

VDD

(I2C-bus)

R: pull-up resistor

R =

1 F

PCF8563P датащи(PDF) 21 Page - NXP Semiconductors

PCF8563P датащи(HTML) 21 Page - NXP Semiconductors

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

датащи скачать

ссылки URL