Datasheet

161
SAM9X35 [DATASHEET]
11055E–ATARM–10-Mar-2014
20. Slow Clock Controller (SCKC)
20.1 Description
The System Controller embeds a Slow Clock Controller.
The slow clock can be generated either by an external 32768 Hz crystal oscillator or by the on-chip 32 kHz RC oscillator.
The 32768 Hz crystal oscillator can be bypassed by setting the OSC32BYP bit to accept an external slow clock on
XIN32.
The internal 32 kHz RC oscillator and the 32768 Hz oscillator can be enabled by setting to 1, respectively, RCEN bit and
OSC32EN bit in the System Controller user interface. The OSCSEL command selects the slow clock source.
20.2 Embedded Characteristics
 32 kHz RC Oscillator or 32768 Hz Crystal Oscillator Selector
 VDDBU Powered