AT91RM3400-DK Atmel, AT91RM3400-DK Datasheet - Page 205
![KIT DEV FOR AT91RM3400](/photos/9/21/92145/at91rm3400-dk__bottom__sml.jpg)
AT91RM3400-DK
Manufacturer Part Number
AT91RM3400-DK
Description
KIT DEV FOR AT91RM3400
Manufacturer
Atmel
Series
AT91SAM Smart ARMr
Type
MCUr
Datasheets
1.AT91RM3400-DK.pdf
(461 pages)
2.AT91RM3400-DK.pdf
(2 pages)
3.AT91RM3400-DK.pdf
(25 pages)
Specifications of AT91RM3400-DK
Contents
Evaluation Board, Software and Documentation
Processor To Be Evaluated
AT91RM3400
Data Bus Width
32 bit
Interface Type
RS-232, USB
For Use With/related Products
AT91RM3400
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
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- Download datasheet (6Mb)
Product Dependencies
Pin Multiplexing
External Interrupt
Lines
Power
Management
Interrupt
Generation
1790A–ATARM–11/03
Each pin is configurable, according to product definition as either a general-purpose I/O line
only, or as an I/O line multiplexed with one or two peripheral I/Os. As the multiplexing is hard-
ware-defined and thus product-dependent, the hardware designer and programmer must
carefully determine the configuration of the PIO controllers required by their application. When
an I/O line is general-purpose only, i.e. not multiplexed with any peripheral I/O, programming
of the PIO Controller regarding the assignment to a peripheral has no effect and only the PIO
Controller can control how the pin is driven by the product.
The interrupt signals FIQ and IRQ0 to IRQn are most generally multiplexed through the PIO
Controllers. However, it is not necessary to assign the I/O line to the interrupt function as the
PIO Controller has no effect on inputs and the interrupt lines (FIQ or IRQs) are used only as
inputs.
The Power Management Controller controls the PIO Controller clock in order to save power.
Writing any of the registers of the user interface does not require the PIO Controller clock to be
enabled. This means that the configuration of the I/O lines does not require the PIO Controller
clock to be enabled.
However, when the clock is disabled, not all of the features of the PIO Controller are available.
Note that the Input Change Interrupt and the read of the pin level require the clock to be
validated.
After a hardware reset, the PIO clock is disabled by default (see Power Management
Controller).
The user must configure the Power Management Controller before any access to the input line
information.
For interrupt handling, the PIO Controllers are considered as user peripherals. This means
that the PIO Controller interrupt lines are connected among the interrupt sources 2 to 31.
Refer to the PIO Controller peripheral identifier in the product description to identify the inter-
rupt sources dedicated to the PIO Controllers.
The PIO Controller interrupt can be generated only if the PIO Controller clock is enabled.
AT91RM3400
205
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