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19.1.3 UART/Modem Functions
The UART/Modem has the following functions:
•
Baud-rate from 300 bits/s up to 3.6864 Mbits/s
•
Auto-baud between 1200 bits/s and 115.2 Kbits/s
•
Software/Hardware flow control
– Programmable Xon/Xoff characters
– Programmable auto-RTS and auto-CTS
•
Programmable serial interface characteristics
– 5, 6, 7, or 8 bit characters
– Even, odd, mark (always = 1), space (always = 0) or no parity (non parity bit frame) bit
generation and detection
– 1, 1.5, or 2 stop bit generation
•
False start bit detection
•
Line break generation and detection
•
Fully prioritized interrupt system controls
•
Internal test and loopback capabilities
•
Modem control functions (CTS, RTS, DSR, DTR, RI, and DCD)
19.1.4 IrDA Functions
The IrDA has the following functions:
•
Slow infrared (SIR 115.2 KBAUD), medium infrared (MIR 0.576 MBAUD) and fast infrared (FIR 4.0
MBAUD) operations (very fast infrared (VFIR) is not supported)
•
Framing error, cyclic redundancy check (CRC) error, illegal symbol (FIR), abort pattern (SIR, MIR)
detection
•
8-entry status FIFO (with selectable trigger levels) available to monitor frame length and frame
errors
19.1.5 CIR Features
The CIR mode uses a variable pulse-width modulation (PWM) technique (based on multiples of a
programmable t period) to encompass the various formats of infrared encoding for remote-control
applications. The CIR logic transmits data packets based on a user-definable frame structure and
packet content.
The CIR includes the following key features to provide CIR support for remote control applications:
•
Consumer Infrared remote control mode with programmable data encoding
•
Transmit and receive modes supported
•
Free data format (supports any remote-control private standards)
•
Selectable bit rate
•
Configurable carrier frequency
•
1/2, 5/12, 1/3, or 1/4 carrier duty cycle
SPRUGX9 – 15 April 2011
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Preliminary
© 2011, Texas Instruments Incorporated
Introduction
1681
UART/IrDA/CIR Module
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