Atmel Evaluation Kit for the SAM4E Series of Flash Microcontrollers ATSAM4E-EK ATSAM4E-EK Data Sheet
Product codes
ATSAM4E-EK
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.
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.
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