atxmega192a1-cu ATMEL Corporation, atxmega192a1-cu Datasheet - Page 26

• Manufacturer Part Number: atxmega192a1-cu
• Description: Atxmega64a1 8/16 Bit Microcontroller With 64/128/192/256k Bytes In-system Programmable Flash
• Manufacturer: ATMEL Corporation

14.4
14.5
26
Input sensing
Port Interrupt
ATxmega A1
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•
•
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The basic input sensing may be synchronous or asynchronous and is built on the configuration
shown in
Figure 14-7. Input sensing system overview
In addition, all GPIO pins may be configured as inverted I/O, meaning that the pin value is
inverted before sensing.
Ports can have pin-change interrupts and external interrupts. Each port supports being the
source of two interrupts, and each pin may be configured individually or grouped. Each of the
interrupts may be given a specific priority and given specific sense configuration.
Sense both edges
Sense rising edges
Sense falling edges
Sense low level
INVERTED I/O
Pn
Figure 14-7 on page
Synchronizer
D Q
R
26.
INn
D Q
R
Asynchronous sensing
Synchronous sensing
DETECT
DETECT
EDGE
EDGE
Interrupt
Control
8067A–AVR–02/08
IREQ
Event