Datasheet

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STARTUP[3:0] Number of
OSCULP32K Clock
Cycles
Number of XOSC
Clock Cycles
Approximate
Equivalent Time(
0x6 64 3 1953μs
0x7 128 3 3906μs
0x8 256 3 7813μs
0x9 512 3 15625μs
0xA 1024 3 31250μs
0xB 2048 3 62500μs
0xC 4096 3 125000μs
0xD 8192 3 250000μs
0xE 16384 3 500000μs
0xF 32768 3 1000000μs
Bit 17 – SWBEN Xosc Clock Switch Enable
This bit controls the XOSCn output clock switch back to the external clock or crystal oscillator in case of
clock recovery :
0: The clock switch back is disabled.
1: The clock switch back is enabled. This bit is reset once the XOSCn output clock is switched back to the
external clock or crystal oscillator.
Bit 16 – CFDEN Clock Failure Detector Enable
This bit controls the XOSCn clock failure detector :
0: the Clock Failure Detector is disabled.
1: the Clock Failure Detector is enabled.
Bit 15 – ENALC Automatic Loop Control Enable
This bit controls the XOSCn automatic loop control :
0: the automatic loop control is disabled.
1: the automatic loop control is enabled. Oscillator's amplitude will be automatically adjusted during
Crystal Oscillator operation.
Bits 14:11 – IMULT[3:0] Oscillator Current Multiplier
These bits select the current multiplier for the oscillator XOSCn, given in table External Multipurpose
Crystal Oscillator Current Settings.
Bits 10:9 – IPTAT[1:0] Oscillator Current Reference
These bits select the current reference for the oscillator XOSCn, given in table below.
SAM D5x/E5x Family Data Sheet
OSCCTRL – Oscillators Controller
© 2019 Microchip Technology Inc.
Datasheet
DS60001507E-page 796