Mcbsps - Texas Instruments OMAP5910 Technical Reference Manual

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9.2 McBSPs

Multichannel buffered serial ports (McBSPs) are configurable, high-speed,

full-duplex serial ports that allow direct interface to external communications

devices. There are three McBSPs on the OMAP5910 device.

McBSP1 and McBSP3 are on the DSP public peripheral bus and are

covered briefly in this chapter.

McBSP2 is on the MPU public peripheral bus and is covered briefly in

Chapter 7, MPU Public Peripherals.

For a detailed description of the functionality of all three McBSPs, see the

TMS320C55x DSP Peripherals Reference Guide (literature number

Key features of the McBSPs include:

Full-duplex communication

DMA support for both RX and TX transfers

Double-buffered data registers, which allow a continuous data stream

Independent framing and clocking for receives and transmits

External shift clock generation or an internal programmable frequency

Multichannel transmits and receives of up to 128 channels

A wide selection of data sizes, including 8-, 12-, 16-, 20-, 24-, or 32-bits

µ-Law and A-Law companding

Data transfers with LSB or MSB first

Programmable polarity for both frame synchronization and data clocks

Highly programmable internal clock and frame generation

Supports bit rates up to 25M bits/second

RX and TX interrupts as well as RX data overrun interrupt

DSP Public Peripherals