atxmega128a4-mu ATMEL Corporation, atxmega128a4-mu Datasheet - Page 25

• Manufacturer Part Number: atxmega128a4-mu
• Description: Atxmega16a4 8/16-bit Avr Xmega Microcontroller
• Manufacturer: ATMEL Corporation

14.4
14.5
8069A–AVR–02/08
Input sensing
Port Interrupt
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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
R
25.
Q
INn
D
R
Q
Asynchronous sensing
Synchronous sensing
DETECT
DETECT
EDGE
EDGE
ATxmega A4
Interrupt
Control
IREQ
Event
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