Samsung S5PC110 Manual page 786

S5PC110_UM
4.9 I/O DESCRIPTION
Signal I/O
XT_RTC_I Input
XT_RTC_O Output
XRTCCLKO Output
NOTE: Type field indicates whether pads are dedicated to the signal or pads are connected to the multiplexed signals .
Description
32.768 kHz RTC Oscillator Clock Input
32.768 kHz RTC Oscillator Clock Output
32.768 kHz RTC Clock Output (1.8 ~ 3.3V).
This signal is turned off by default. It can be
enabled by setting 1 in CLKOUTEN field of
RTCCON register.
Note: In order to use XRTCCLO, ALIVE power
must be supplied.
4 REAL TIME CLOCK (RTC)
Pad Type
XrtcXTI Dedicated
XrtcXTO Dedicated
XRTCCLKO Dedicated
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