Datasheet

727
SAM4S Series [DATASHEET]
11100F–ATARM–29-Jan-14
35. Universal Asynchronous Receiver Transmitter (UART)
35.1 Description
The Universal Asynchronous Receiver Transmitter (UART) 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.
35.2 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
35.3 Block Diagram
Figure 35-1. UART Functional Block Diagram
Peripheral DMA Controller
Baud Rate
Generator
Transmit
Receive
Interrupt
Control
Peripheral
Bridge
Parallel
Input/
Output
UTXD
URXD
Power
Management
Controller
MCK
uart_irq
APB
UART
Table 35-1. UART Pin Description
Pin Name Description Type
URXD UART Receive Data Input
UTXD UART Transmit Data Output