Atmel Xplained Evaluation Board AT32UC3A3-XPLD AT32UC3A3-XPLD Datenbogen
Produktcode
AT32UC3A3-XPLD
382
32072H–AVR32–10/2012
AT32UC3A3
20.4.1
Module Configuration
Most of the features of the GPIO are configurable for each product. The user must refer to the
Package and Pinout chapter for these settings.
Package and Pinout chapter for these settings.
Product specific settings includes:
• Number of I/O pins.
• Functions implemented on each pin
• Peripheral function(s) multiplexed on each I/O pin
• Reset value of registers
20.4.2
Clocks
The clock for the GPIO bus interface (CLK_GPIO) is generated by the Power Manager. This
clock is enabled at reset, and can be disabled in the Power Manager.
clock is enabled at reset, and can be disabled in the Power Manager.
The CLK_GPIO must be enabled in order to access the configuration registers of the GPIO or to
use the GPIO interrupts. After configuring the GPIO, the CLK_GPIO can be disabled if interrupts
are not used.
use the GPIO interrupts. After configuring the GPIO, the CLK_GPIO can be disabled if interrupts
are not used.
20.4.3
Interrupts
The GPIO interrupt lines are connected to the interrupt controller. Using the GPIO interrupt
requires the interrupt controller to be configured first.
requires the interrupt controller to be configured first.
20.5
Functional Description
The GPIO controls the I/O lines of the microcontroller. The control logic associated with each pin
is represented in the figure below:
is represented in the figure below: