TMS320DM8148 Datasheet, PDF (329/343 Pages) Texas Instruments – TMS320DM814x DaVinci™ Digital Media Processors

TMS320DM8148, TMS320DM8147
www.ti.com
SPRS647 – MARCH 2011
8.21 Universal Asynchronous Receiver/Transmitter (UART)
The UART performs serial-to-parallel conversions on data received from a peripheral device and
parallel-to-serial conversion on data received from the CPU. The device provides up to six UART
peripheral interfaces, depending on the selected pin multiplexing.
Each UART has the following features:
• Selectable UART/IrDA (SIR/MIR)/CIR modes
• Dual 64-entry FIFOs for received and transmitted data payload
• Programmable and selectable transmit and receive FIFO trigger levels for DMA and interrupt
generation
• Baud-rate generation based upon programmable divisors N (N=1…16384)
• Two DMA requests and one interrupt request to the system
• Can connect to any RS-232 compliant device.
UART functions include:
• Baud-rate up to 3.6 Mbit/s on UART0, UART1, and UART2
• Baud-rate up to 12 Mbit/s on UART3, UART4, and UART5
• Programmable serial interfaces characteristics
– 5, 6, 7, or 8-bit characters
– Even, odd, or no parity-bit generation and detection
– 1, 1.5, or 2 stop-bit generation
– Flow control: hardware (RTS/CTS) or software (XON/XOFF)
• Additional modem control functions (UART0_DTR, UART0_DSR, UART0_DCD, and UART0_RIN) for
UART0 only; UART1, UART2, UART3, UART4, and UART5 do not support full-flow control signaling.
IR-IrDA functions include:
• Support of IrDA 1.4 slow infrared (SIR, baud-rate up to 115.2 Kbits/s), medium infrared (MIR,
baud-rate up to 1.152 Mbits/s) and fast infrared (FIR baud-rate up to 4.0 Mbits/s) communications
• Supports framing error, cyclic redundancy check (CRC) error, illegal symbol (FIR), and abort pattern
(SIR, MIR) detection
• 8-entry status FIFO (with selectable trigger levels) available to monitor frame length and frame errors.
IR-CIR functions include:
• Consumer infrared (CIR) remote control mode with programmable data encoding
• Free data format (supports any remote control private standards)
• Selectable bit rate and configurable carrier frequency.
For more detailed information on the UART peripheral, see the TMS320DM814x DMSoc Universal
Asynchronous Receiver/Transmitter (UART) User's Guide (TBD).
8.21.1 UART Peripheral Register Descriptions
Copyright © 2011, Texas Instruments Incorporated
Peripheral Information and Timings 329
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