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RTC circuit with ATmega8 and watch crystal stops after 20 minutes

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electronic6000

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hi
my RTC circuit with ATMEGA8 + watch crystal is working well but after 20 min its stop and i reset micro

accuracy of ds1307 == RTC crystal watch ???



accuracy of crystal watch above 10 min is low

and i don't connect cap too TOSC1&TOSC2 pins

please help me;
 

Re: RTC Problem

No capacitor needed . you should use 32.768Khz watch crystal. Are uyou using the same crystal????/


That gives you stable operation. and also 11.0593MHz crystal.
 

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