6.2.1 Oscillator Pinout

The oscillators are not mapped to the normal PORT functions and their multiplexing is controlled by registers in the Oscillators Controller (OSCCTRL) and in the 32K Oscillators Controller (OSC32KCTRL).

Table 6-2. Oscillator Pinout
Oscillator	Supply	Signal	I/O pin
XOSC	VDDIO	XIN	PB22
XOSC	VDDIO	XOUT	PB23
XOSC32K	VSWOUT	XIN32	PA00
XOSC32K	VSWOUT	XOUT32	PA01

Note: In order to minimize the cycle-to-cycle jitter of the external oscillator, keep the neighboring pins as steady as possible. For neighboring pin details, refer to the Oscillator Pinout section.

Table 6-3. XOSC32K Jitter Minimization
Package	Steady Signal Recommended
L22N	PB00, PB01, PB02, PB03, PC00, PC01
L22J	PB00, PB01, PB02, PB03, PA02, PA03
L22G	PB02, PB03, PA02, PA03