ATSAM3U-EK Atmel, ATSAM3U-EK Datasheet - Page 688

Manufacturer Part Number

KIT EVAL FOR AT91SAM3U CORTEX

Manufacturer

Processor To Be Evaluated

Data Bus Width

Interface Type

Operating Supply Voltage

Silicon Manufacturer

Core Architecture

Core Sub-architecture

Silicon Core Number

Silicon Family Name

Kit Contents

Board CD Docs

Rohs Compliant

For Use With/related Products

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Manufacturer

Part Number:

Manufacturer:

Product Dependencies

SAM3U Series

The pins used for interfacing the USART may be multiplexed with the PIO lines. The program-

mer must first program the PIO controller to assign the desired USART pins to their peripheral

function. If I/O lines of the USART are not used by the application, they can be used for other

purposes by the PIO Controller.

To prevent the TXD line from falling when the USART is disabled, the use of an internal pull up

is mandatory. If the hardware handshaking feature or Modem mode is used, the internal pull up

on TXD must also be enabled.

All the pins of the modems may or may not be implemented on the USART. On USARTs not

equipped with the corresponding pin, the associated control bits and statuses have no effect on

the behavior of the USART.

6430D–ATARM–25-Mar-11