CONFIG

External Interrupt Sense Configuration

Important: For SAM L11 Non-Secure accesses, read and write accesses (RW*) are allowed only if the external interrupt x (EXTINTx) is set as Non-Secure in the NONSEC register (NONSEC.EXTINTx bit). Some restrictions apply for the Non-Secure accesses to an Enable-Protected register as it will not be possible for the Non-Secure to configure it once this register is enabled by the Secure application. This will require some veneers to be implemented on the Secure side.

0x1C 32 PAC Write-Protection, Enable-Protected, Mix-Secure 0x00000000

External Interrupt Sense Configuration
FILTENx
Filter Enable x [x=7..0]
SENSEx
Input Sense Configuration x [x=7..0]

External Interrupt Sense Configuration

Bit	31	30	29	28	27	26	25	24
	FILTEN7	SENSE7[2:0]			FILTEN6	SENSE6[2:0]
Access	RW/RW*/RW	RW/RW*/RW	RW/RW*/RW	RW/RW*/RW	RW/RW*/RW	RW/RW*/RW	RW/RW*/RW	RW/RW*/RW
Reset	0	0	0	0	0	0	0	0

Bit	23	22	21	20	19	18	17	16
	FILTEN5	SENSE5[2:0]			FILTEN4	SENSE4[2:0]
Access	RW/RW*/RW	RW/RW*/RW	RW/RW*/RW	RW/RW*/RW	RW/RW*/RW	RW/RW*/RW	RW/RW*/RW	RW/RW*/RW
Reset	0	0	0	0	0	0	0	0

Bit	15	14	13	12	11	10	9	8
	FILTEN3	SENSE3[2:0]			FILTEN2	SENSE2[2:0]
Access	RW/RW*/RW	RW/RW*/RW	RW/RW*/RW	RW/RW*/RW	RW/RW*/RW	RW/RW*/RW	RW/RW*/RW	RW/RW*/RW
Reset	0	0	0	0	0	0	0	0

Bit	7	6	5	4	3	2	1	0
	FILTEN1	SENSE1[2:0]			FILTEN0	SENSE0[2:0]
Access	RW/RW*/RW	RW/RW*/RW	RW/RW*/RW	RW/RW*/RW	RW/RW*/RW	RW/RW*/RW	RW/RW*/RW	RW/RW*/RW
Reset	0	0	0	0	0	0	0	0

Bits 3, 7, 11, 15, 19, 23, 27, 31 – FILTENx: Filter Enable x [x=7..0]

Filter Enable x [x=7..0]

Value	Description
0	Filter is disabled for EXTINT[x] input.
1	Filter is enabled for EXTINT[x] input.

Bits 0:2, 4:6, 8:10, 12:14, 16:18, 20:22, 24:26, 28:30 – SENSEx: Input Sense Configuration x [x=7..0]

Input Sense Configuration x [x=7..0]

These bits define on which edge or level the interrupt or event for EXTINT[x] will be generated.

Value	Name	Description
0x0	NONE	No detection
0x1	RISE	Rising-edge detection
0x2	FALL	Falling-edge detection
0x3	BOTH	Both-edge detection
0x4	HIGH	High-level detection
0x5	LOW	Low-level detection
0x6 - 0x7	-	Reserved