Samsung S5PC110 Manual page 785

S5PC110_UM 4 REAL TIME CLOCK (RTC)
4.7 32.768KHZ X-TAL CONNECTION EXAMPLE
shows a circuit of the RTC unit oscillation at 32.768kHz. The capacitance 20pF of the load capacitor is
Figure 4-2
an example value. It should be adjusted according to the crystal load capacitance.
Figure 4-2 Main Oscillator Circuit Example
4.8 RTC START
To start RTC, set RTCCON[0] as 1.
4-6