Datasheet

SAM4E [DATASHEET]
Atmel-11157D-ATARM-SAM4E16-SAM4E8-Datasheet_12-Jun-14
866
37. Universal Asynchronous Receiver Transmitter (UART)
37.1 Description
The Universal Asynchronous Receiver Transmitter features a two-pin UART that can be used for communication
and trace purposes and offers an ideal medium for in-situ programming solutions.
Moreover, the association with a peripheral DMA controller (PDC) permits packet handling for these tasks with
processor time reduced to a minimum.
37.2 Embedded Characteristics
 Two-pin UART
̶ Independent Receiver and Transmitter with a Common Programmable Baud Rate Generator
̶ Even, Odd, Mark or Space Parity Generation
̶ Parity, Framing and Overrun Error Detection
̶ Automatic Echo, Local Loopback and Remote Loopback Channel Modes
̶ Interrupt Generation
̶ Support for Two PDC Channels with Connection to Receiver and Transmitter
̶ Register Write Protection
37.3 Block Diagram
Figure 37-1. UART Functional Block Diagram
Peripheral DMA Controller
Baud Rate
Generator
Transmit
Receive
Interrupt
Control
Parallel
Input/
Output
UTXD
URXD
uart_irq
APB
bus clock
Bridge
peripheral clock
PMC
UART
Table 37-1. UART Pin Description
Pin Name Description Type
URXD UART Receive Data Input
UTXD UART Transmit Data Output