236
ABOV Semiconductor Co., Ltd.
11.12 UART2/3/4
11.12.1 Overview
The universal asynchronous serial receiver and transmitter (UART2/3/4) is a highly flexible serial communication
device. The main features are listed below.
− Full Duplex Operation (Independent Serial Receive and Transmit Registers)
− Baud Rate Generator
− Supports Serial Frames with 5, 6, 7, 8 or 9 Data Bits and 1 or 2 Stop Bits
− Odd or Even Parity Generation and Parity Check Supported by Hardware
− Data OverRun Detection
− Framing Error Detection
− Three Separate Interrupts on TX Complete, TX Data Register Empty and RX Complete
UART2/3/4 has baud rate generator, transmitter and receiver. The baud rate generator for asynchronous operation.
The Transmitter consists of a single write buffer, a serial shift register, parity generator and control logic for handling
different serial frame formats. The write buffer allows continuous transfer of data without any delay between frames.
The receiver is the most complex part of the UART2/3/4 module due to its clock and data recovery units. The recovery
unit is used for asynchronous data reception. In addition to the recovery unit, the receiver includes a parity checker, a
shift register, a two-level receive FIFOn (UARTnDR) and control logic. The receiver supports the same frame formats
as the transmitter and can detect frame error, data overrun and parity errors.
To Next Page
Loading...
Need help?
General
