geobabu
Member level 2
I got a problem when using a PCF8563 RTC with a Capacitor based power supply for 5V. The circuit created for the purpose is shown in the attached file. The issue is with the accuracy. When the same circuit is connected to a pure 5V dc supply from an external power source, the RTC gives me exactly 1Hz pulse at the ClKOUT pin of the IC, and the time flow is correct.
But when its powered from the direct line supply, the capacitor power supply is giving exactly 5V and rest of the parts are working fine (a PIC controller) . But the accuracy of the RTC is gone worse, its get delayed. When I noticed , the ClKOUT pin, its waveform is represented in the image file attached . Its seems like a huge delayed oscillator startup.
What is happening in this case, expecting your help
Thanks in advance
Geo
But when its powered from the direct line supply, the capacitor power supply is giving exactly 5V and rest of the parts are working fine (a PIC controller) . But the accuracy of the RTC is gone worse, its get delayed. When I noticed , the ClKOUT pin, its waveform is represented in the image file attached . Its seems like a huge delayed oscillator startup.
What is happening in this case, expecting your help
Thanks in advance
Geo