The oscillators are not mapped to the normal PORT
functions and their multiplexing are controlled by registers in the Oscillators
Controller (OSCCTRL) and in the 32KHz Oscillators Controller (OSC32KCTRL).
Table 7-3. Oscillator Pinout
| Oscillator |
Supply |
Signal |
I/O pin |
| XOSC |
VDDIO |
XIN |
PA14 |
| XOUT |
PA15 |
| XOSC32K |
VSWOUT |
XIN32 |
PA00 |
| XOUT32 |
PA01 |
Note: To improve the cycle-to-cycle jitter of
XOSC32, it is recommended to keep the neighboring pins of XIN32 and XOUT32 following
pins as static as possible.
Table 7-4. XOSC32K Jitter
Minimization
| Package Pin Count |
Static Signal Recommended |
| 48 |
PB02, PB03, PA02, PA03 |
