The SAM4L Xplained Pro kit contains two crystals that can be used as clock sources for the
SAM4L device. Each crystal has a cut-strap next to it that can be used to
measure the oscillator safety factor. This is done by cutting the strap and adding a
resistor across the strap. More information about oscillator allowance and safety factor
can be found in appnote AVR4100.
Table 4-7. External 32.768kHz
Crystal| Pin on SAM4L | Function |
|---|
| XIN32 | XIN32 |
| XOUT32 | XOUT32 |
Table 4-8. External 12MHz
Crystal| Pin on SAM4L | Function |
|---|
| PA00 | XIN0 |
| PA01 | XOUT0 |
