SAM3X8C Atmel Corporation, SAM3X8C Datasheet - Page 648

• Manufacturer Part Number: SAM3X8C
• Manufacturer: Atmel Corporation

Figure 31-7. Event Detector on Input Lines (Figure represents line 0)
31.5.10.1
31.5.10.2
31.5.10.3
31.5.10.4
648
648
Resynchronized input on line 0
SAM3X/A
SAM3X/A
Example
Interrupt Mode Configuration
Edge or Level Detection Configuration
Falling/Rising Edge or Low/High Level Detection Configuration.
If generating an interrupt is required on the following:
The configuration required is described below.
All the interrupt sources are enabled by writing 32’hFFFF_FFFF in PIO_IER.
Then the Additional Interrupt Mode is enabled for line 0 to 7 by writing 32’h0000_00FF in
PIO_AIMER.
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 con-
figured. Otherwise, lines 0, 1, 2, 6 and 7 must be configured in Edge detection by writing
32’h0000_00C7 in PIO_ESR.
Lines 0, 2, 4, 5 and 7 are configured in Rising Edge or High Level detection by writing
32’h0000_00B5 in PIO_REHLSR.
• 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
PIO_REHLSR[0]
PIO_FELLSR[0]
Rising Edge
Falling Edge
High Level
Detector
Low Level
Detector
Detector
Detector
Detector
Edge
PIO_FRLHSR[0]
0
0
1
1
PIO_LSR[0]
PIO_ESR[0]
PIO_ELSR[0]
1
0
PIO_AIMER[0]
PIO_AIMDR[0]
PIO_AIMMR[0]
1
0
Event detection on line 0
Event Detector
11057A–ATARM–17-Feb-12
11057A–ATARM–17-Feb-12