TMS320DM355CZCEA13 datasheet(144/163 Pages) TI1

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TMS320DM355

SPRS463G – SEPTEMBER 2007 – REVISED JUNE 2010

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5.14 Audio Serial Port (ASP)

DM355 includes two separate ASP controllers. The primary use for the audio serial port (ASP) is for audio

interface purposes. The primary audio modes that are supported by the ASP are the AC97 and IIS modes.

In addition to the primary audio modes, the ASP supports general serial port receive and transmit

operation, but is not intended to be used as a high-speed interface. The ASP is backward compatible with

other TI ASPs. The ASP supports the following features:

•

Full-duplex communication

•

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

•

Independent framing and clocking for receive and transmit

•

External shift clock generation or an internal programmable frequency shift clock

•

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

•

Independent framing and clocking for receive and transmit

•

Direct interface to industry-standard codecs, analog interface chips (AICs), and other serially

connected analog-to-digital (A/D) and digital-to-analog (D/A) devices

•

Direct interface to AC97 compliant devices (the necessary multiphase frame synchronization capability

is provided)

•

Direct interface to IIS compliant devices

•

Direct interface to SPI protocol in master mode only

•

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

•

m-Law and A-Law companding

•

8-bit data transfers with the option of LSB or MSB first

•

Programmable polarity for both frame synchronization and data clocks

•

Highly programmable internal clock and frame generation

For more detailed information on the ASP peripheral, see the TMS320DM35x Digital Media

System-on-Chip (DMSoC) Audio Serial Port (ASP) Reference Guide (literature number SPRUED3).

144

DM355 Peripheral Information and Electrical Specifications

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