ATxmega128D4-AU ATMEL [ATMEL Corporation], ATxmega128D4-AU Datasheet - Page 33

• Manufacturer Part Number: ATxmega128D4-AU
• Description: 8/16-bit Atmel XMEGA D4 Microcontroller
• Manufacturer: ATMEL [ATMEL Corporation]

14.4
14.5
8135L–AVR–06/12
Input sensing
Alternate Port Functions
Input sensing is synchronous or asynchronous depending on the enabled clock for the ports,
and the configuration is shown in
Figure 14-7. Input sensing system overview.
When a pin is configured with inverted I/O, the pin value is inverted before the input sensing.
Most port pins have alternate pin functions in addition to being a general purpose I/O pin. When
an alternate function is enabled, it might override the normal port pin function or pin value. This
happens when other peripherals that require pins are enabled or configured to use pins. If and
how a peripheral will override and use pins is described in the section for that peripheral.
and Pin Functions” on page 51
tions on a pin, and which alternate functions that are available on a pin.
INVERTED I/O
Pn
Synchronizer
D Q
R
shows which modules on peripherals that enable alternate func-
INn
D Q
Figure
R
14-7.
Asynchronous sensing
Synchronous sensing
DETECT
DETECT
EDGE
EDGE
XMEGA D4
Interrupt
Control
IREQ
Event
”Pinout
33