DRA790 Datasheet, PDF (346/436 Pages) Texas Instruments – Infotainment Applications Processor

DRA790, DRA791
DRA793, DRA797
SPRS968A – AUGUST 2016 – REVISED FEBRUARY 2017
www.ti.com
• The 48 MHz functional clock option allows baud rates up to 3.6Mbps
• The 192 MHz functional clock option allows baud rates up to 12Mbps
• UART1 module has extended modem control signals (DCD, RI, DTR, DSR)
• UART3 supports IrDA
6.11.5.2 IrDA Features
UART3 supports the following IrDA key features:
• Support of IrDA 1.4 slow infrared (SIR), medium infrared (MIR), and fast infrared (FIR)
communications:
– Frame formatting: Addition of variable beginning-of-frame (xBOF) characters and end-of-frame
(EOF) characters
– Uplink/downlink cyclic redundancy check (CRC) generation/detection
– Asynchronous transparency (automatic insertion of break character)
– Eight-entry status FIFO (with selectable trigger levels) to monitor frame length and frame errors
– Framing error, CRC error, illegal symbol (FIR), and abort pattern (SIR, MIR) detection
6.11.5.3 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 (UART3 only) includes the following features to provide CIR support for remote-control
applications:
• Transmit mode only (receive mode is not 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
For more information, see section Universal Asynchronous Receiver/Transmitter (UART) in chapter Serial
Communication Interfaces of the device TRM.
6.11.6 McSPI
The McSPI is a master/slave synchronous serial bus. There are four separate McSPI modules (McSPI1,
McSPI2, McSPI3, and McSPI4) in the device. All these four modules support up to four external devices
(four chip selects) and are able to work as both master and slave.
The McSPI modules include the following main features:
• Serial clock with programmable frequency, polarity, and phase for each channel
• Wide selection of McSPI word lengths, ranging from 4 to 32 bits
• Up to four master channels, or single channel in slave mode
• Master multichannel mode:
– Full duplex/half duplex
– Transmit-only/receive-only/transmit-and-receive modes
– Flexible input/output (I/O) port controls per channel
– Programmable clock granularity
– McSPI configuration per channel. This means, clock definition, polarity enabling and word width
• Single interrupt line for multiple interrupt source events
• Power management through wake-up capabilities
• Enable the addition of a programmable start-bit for McSPI transfer per channel (start-bit mode)
346 Detailed Description
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