Atmel Xplained Pro Evaluation Kit ATSAM4E-XPRO ATSAM4E-XPRO Fiche De Données

SAM4E [DATASHEET]

Atmel-11157D-ATARM-SAM4E16-SAM4E8-Datasheet_12-Jun-14

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Example of interrupt generation on following lines:



Rising edge on PIO line 0



Falling edge on PIO line 1



Rising edge on PIO line 2



Low-level on PIO line 3



High-level on PIO line 4



High-level on PIO line 5



Falling edge on PIO line 6



Rising edge on PIO line 7



Any edge on the other lines

 details the required configuration for this example.

Event Detector

0

1

0

1

1

0

0

1

Edge

Detector

Falling Edge

Detector

Rising Edge

Detector

PIO_FELLSR[0]

PIO_FRLHSR[0]

PIO_REHLSR[0]

Low Level

Detector

High Level

Detector

PIO_ESR[0]

PIO_ELSR[0]

PIO_LSR[0]

PIO_AIMDR[0]

PIO_AIMMR[0]

PIO_AIMER[0]

Event detection on line 0

Resynchronized input on line 0

Interrupt Mode

All the interrupt sources are enabled by writing 32’hFFFF_FFFF in PIO_IER.

Then the additional interrupt mode is enabled for lines 0 to 7 by writing 32’h0000_00FF in 
PIO_AIMER.

Edge or Level Detection

Lines 3, 4 and 5 are configured in level detection by writing 32’h0000_0038 in PIO_LSR. 

The other lines are configured in edge detection by default, if they have not been previously 
configured. Otherwise, lines 0, 1, 2, 6 and 7 must be configured in edge detection by writing 
32’h0000_00C7 in PIO_ESR.

Falling/Rising Edge or Low/High-Level 
Detection

Lines 0, 2, 4, 5 and 7 are configured in rising edge or high-level detection by writing 
32’h0000_00B5 in PIO_REHLSR.

The other lines are configured in falling edge or low-level detection by default if they have 
not been previously configured. Otherwise, lines 1, 3 and 6 must be configured in falling 
edge/low-level detection by writing 32’h0000_004A in PIO_FELLSR.