Chapter 19 Universal Asynchronous Receiver-Transmitter (UART).pdf
Chapter 19 Universal Asynchronous Receiver-Transmitter (UART).pdf
Chapter 19 Universal Asynchronous Receiver-Transmitter (UART).pdf
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Introduction www.ti.com<br />
<strong>19</strong>.1 Introduction<br />
<strong>19</strong>.1.1 <strong>UART</strong> Mode Features<br />
The general features of the <strong>UART</strong>/IrDA module when operating in <strong>UART</strong> mode are:<br />
• 16C750 compatibility<br />
• Baud rate from 300 bps up to 3.6864 Mbps<br />
• Auto-baud between 1200 bps and 115.2 Kbps<br />
• Software/Hardware flow control<br />
– Programmable Xon/Xoff characters<br />
– Programmable Auto-RTS and Auto CTS<br />
• Programmable serial interface characteristics<br />
– 5, 6, 7, or 8-bit characters<br />
– Even, odd, mark (always 1), space (always 0), or no parity (non-parity bit frame) bit generation and<br />
detection<br />
– 1, 1.5, or 2 stop bit generation<br />
• False start bit detection<br />
• Line break generation and detection<br />
• Modem control functions (CTS, RTS, DSR, DTR, RI, and DCD)<br />
• Fully prioritized interrupt system controls<br />
• Internal test and loopback capabilities<br />
<strong>19</strong>.1.2 IrDA Mode Features<br />
The general features of the <strong>UART</strong>/IrDA when operating in IrDA mode are:<br />
• Support of IrDA 1.4 slow infrared (SIR), medium infrared (MIR) and fast infrared (FIR) communications<br />
(very fast infrared (VFIR) is not supported)<br />
• Frame formatting: addition of variable xBOF characters and EOF characters<br />
• Uplink/downlink CRC generation/detection<br />
• <strong>Asynchronous</strong> transparency (automatic insertion of break character)<br />
• 8-entry status FIFO (with selectable trigger levels) available to monitor frame length and frame errors<br />
• Framing error, cyclic redundancy check (CRC) error, illegal symbol (FIR), abort pattern (SIR, MIR)<br />
detection<br />
<strong>19</strong>.1.3 CIR Mode Features<br />
The general features of the <strong>UART</strong>/IrDA when operating in CIR mode are:<br />
• Support of consumer infrared (CIR) for remote control applications<br />
• Transmit and receive<br />
• Free data format (supports any remote control private standards)<br />
• Selectable bit rate<br />
• Configurable carrier frequency<br />
• 1/2, 5/12, 1/3 or 1/4 carrier duty cycle<br />
<strong>19</strong>.1.4 Unsupported <strong>UART</strong> Features<br />
The following <strong>UART</strong>/IrDA module features are not supported in this device.<br />
3626 <strong>Universal</strong> <strong>Asynchronous</strong> <strong>Receiver</strong>/<strong>Transmitter</strong> (<strong>UART</strong>) SPRUH73E–October 2011–Revised May 2012<br />
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