38.5 Peripheral Dependencies


Peripheral name	Base address	NVIC IRQ Index	AHB/APB Clocks	GCLK Peripheral Channel Index (GCLK.PCHCTRL)	PAC Peripheral Identifier Index (PAC.WRCTRL)	Events (EVSYS)		DMA Trigger Source Index (CHCTRLB.TRIGSRC)
Peripheral name	Base address	NVIC IRQ Index	AHB/APB Clocks	GCLK Peripheral Channel Index (GCLK.PCHCTRL)	PAC Peripheral Identifier Index (PAC.WRCTRL)	Users (USERm)	Generators (CHANNELn.EVGEN)	DMA Trigger Source Index (CHCTRLB.TRIGSRC)
AC	0x42004C00	27: COMP0-3	CLK_AC_APB Disabled at reset	42	83 Not protected at reset	32-35: SOC0-3	72-75: COMP0-3	-
AC	0x42004C00	27: WIN0-1	CLK_AC_APB Disabled at reset	42	83 Not protected at reset	32-35: SOC0-3	76-77: WIN0-1	-

Each comparator has up to four I/O pins that can be used as analog inputs. Each pair of comparators shares the same four pins. These pins must be configured for analog operation before using them as comparator inputs.

Internal reference sources (DAC, INTREF supplied by the bandgap or VSCALE) must be configured and enabled prior to their use as a comparator input. Allow 10 µs for the bandgap to stabilize before enabling the AC interrupt or EVSYS event channel.