Uart Interface Controller (Uart); Overview; Features - Nuvoton ISD94124BYI Technical Reference Manual

6.12 UART Interface Controller (UART)

6.12.1 Overview

The ISD94100 series is equipped with one Universal Asynchronous Receiver/Transmitters (UART)
port, which offers a mean of full-duplex asynchronous communication with external device.
The ISD94100 series UART controller also supports RS-485 standard.

6.12.2 Features


One UART port: UART0.

Programmable baud-rate generator

Separate receive (RX) and transmit (TX) FIFOs with 16 bytes each to reduce CPU interrupt
service loading

RX FIFO trigger level of 1/16, 4/16, 8/16 and 14/16.

Supports hardware auto-flow control

Supports wake-up function which can be triggered by nCTS, incoming data, RX FIFO reached
threshold or RS-485 Address Match (AAD mode).

Supports 8-bit RX FIFO time-out detection function

Programmable transmitting data delay time between the last stop and the next start bit by
setting DLY (UART_TOUT [15:8])

Supports Auto-Baud Rate measurement and baud rate compensation function

Supports break error, frame error, parity error and receive/transmit buffer overflow detection
function

Fully programmable serial-interface characteristics

5, 6, 7, or 8 data bits

even, odd, stick or no-parity generation/detection

1, 1.5, or 2 stop bit generation

Support PDMA transfer function

Supports RS-485 function mode

RS-485 9-bit mode

hardware or software managing nRTS pin to control RS-485 transmission direction
FIFO
Auto Flow Control (CTS/RTS)
RS-485 Function Mode
nCTS Wake-up
Sep 9, 2019
ISD94100 Series Technical Reference Manual
UART Feature
Page 566 of 928
UART0
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Rev1.09