ATXMEGA128B3-AU ATMEL [ATMEL Corporation], ATXMEGA128B3-AU Datasheet - Page 34

• Manufacturer Part Number: ATXMEGA128B3-AU
• Description: 8/16-bit Atmel XMEGA B3 Microcontroller
• Manufacturer: ATMEL [ATMEL Corporation]

15.4
15.5
8074B–AVR–02/12
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 15-7. 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 56
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 15-7 on page
R
Asynchronous sensing
Synchronous sensing
DETECT
DETECT
EDGE
EDGE
34.
XMEGA B3
Interrupt
Control
IREQ
Event
”Pinout
34