#ifdef AO_XOSC
ao_enable_output(&samd21_port_b, 10, 1);
/* Enable xosc (external xtal oscillator) */
- samd21_sysctrl.xosc = ((SAMD21_SYSCTRL_XOSC_STARTUP_8192 << SAMD21_SYSCTRL_XOSC_STARTUP) |
- (0 << SAMD21_SYSCTRL_XOSC_AMPGC) |
+ samd21_sysctrl.xosc = ((SAMD21_SYSCTRL_XOSC_STARTUP_16384 << SAMD21_SYSCTRL_XOSC_STARTUP) |
+ (1 << SAMD21_SYSCTRL_XOSC_AMPGC) |
(SAMD21_SYSCTRL_XOSC_GAIN_16MHz << SAMD21_SYSCTRL_XOSC_GAIN) |
(0 << SAMD21_SYSCTRL_XOSC_ONDEMAND) |
(1 << SAMD21_SYSCTRL_XOSC_RUNSTDBY) |