AM3874 datasheet(345/361 Pages) TI

345 / 361 page

AM3874, AM3871

www.ti.com

SPRS695C – SEPTEMBER 2011 – REVISED DECEMBER 2013

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 UART/IrDA/CIR Module chapter of the

AM387x Sitara™ ARM Processors Technical Reference Manual (Literature Number: SPRUGZ7).

8.21.1 UART Peripheral Register Descriptions

Peripheral Information and Timings

345

Submit Documentation Feedback

Product Folder Links: AM3874 AM3871

AM3874 Datasheet(PDF) 345 Page - Texas Instruments

AM3874 Datasheet(HTML) 345 Page - Texas Instruments

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL