Datasheet

29.5.2 Power Management
The OSC32KCTRL will continue to operate in any sleep mode where a 32KHz oscillator is running as
source clock. The OSC32KCTRL interrupts can be used to wake up the device from sleep modes.
Related Links
18. PM – Power Manager
29.5.3 Clocks
The OSC32KCTRL gathers controls for all 32KHz oscillators and provides clock sources to the Generic
Clock Controller (GCLK), Real-Time Counter (RTC), and Watchdog Timer (WDT).
The available clock sources are: XOSC32K and OSCULP32K.
The OSC32KCTRL bus clock (CLK_OSC32KCTRL_APB) can be enabled and disabled in the Main Clock
module (MCLK).
29.5.4 Interrupts
The interrupt request lines are connected to the interrupt controller. Using the OSC32KCTRL interrupts
requires the interrupt controller to be configured first.
Related Links
10.2 Nested Vector Interrupt Controller
29.5.5 Events
The events of this peripheral are connected to the Event System.
Related Links
31. EVSYS – Event System
29.5.6 Debug Operation
When the CPU is halted in debug mode, OSC32KCTRL will continue normal operation. If OSC32KCTRL
is configured in a way that requires it to be periodically serviced by the CPU through interrupts or similar,
improper operation or data loss may result during debugging.
29.5.7 Register Access Protection
All registers with write access can be write-protected optionally by the Peripheral Access Controller
(PAC), except for the following registers:
• Interrupt Flag Status and Clear (INTFLAG) register
Optional write protection by the Peripheral Access Controller (PAC) is denoted by the "PAC Write
Protection" property in each individual register description.
PAC write protection does not apply to accesses through an external debugger.
Related Links
27. PAC - Peripheral Access Controller
29.5.8 Analog Connections
The external 32.768kHz crystal must be connected between the XIN32 and XOUT32 pins, along with any
required load capacitors. For details on recommended oscillator characteristics and capacitor load, refer
to the related links.
SAM D5x/E5x Family Data Sheet
OSC32KCTRL – 32KHz Oscillators Controller
© 2019 Microchip Technology Inc.
Datasheet
DS60001507E-page 813