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3.5 RTC(FC-135, X100)
The AD6900 supports a Real Time Clock function. A total of 25pF+/-10% capacitance to graound is
required (including board trace capacitance) on each OSCIN and OSCOUT.
RTC functionality allows the application software to implement standard clock, calendar, or organizer
functions.
A 32KHz clock is required in AD6900 based systems to take advantage of power saving "slow
clocking" mode. A combination of an oscillator circuit within the AD6900 IC and an external 32KHz
crystal results in a stable 32kHz clock for use in the system. The purpose of this application note is to
discuss the system issues that affect operation of the 32kHz oscillator circuit.
Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Figure. 3-5-1 32.768KHz Crystal Basic Connections
3. TECHNICAL BRIEF
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LGE Internal Use Only
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