AM4376 datasheet(219/261 Pages) TI

219 / 261 page

AM4376, AM4377, AM4378, AM4379

www.ti.com

SPRS851B – JUNE 2014 – REVISED APRIL 2015

5.12.12 Multichannel Audio Serial Port (McASP)

The multichannel audio serial port (McASP) functions as a general-purpose audio serial port optimized for the

needs of multichannel audio applications. The McASP is useful for time-division multiplexed (TDM) stream, Inter-

Integrated Sound (I2S) protocols, and inter-component digital audio interface transmission (DIT).

5.12.12.1 McASP Device-Specific Information

The device includes two multichannel audio serial port (McASP) interface peripherals (McASP0 and McASP1).

The McASP module consists of a transmit and receive section. These sections can operate completely

independently with different data formats, separate master clocks, bit clocks, and frame syncs or, alternatively,

the transmit and receive sections may be synchronized. The McASP module also includes shift registers that

may be configured to operate as either transmit data or receive data.

The transmit section of the McASP can transmit data in either a time-division-multiplexed (TDM) synchronous

serial format or in a digital audio interface (DIT) format where the bit stream is encoded for SPDIF, AES-3, IEC-

60958, CP-430 transmission. The receive section of the McASP peripheral supports the TDM synchronous serial

format.

The McASP module can support one transmit data format (either a TDM format or DIT format) and one receive

format at a time. All transmit shift registers use the same format and all receive shift registers use the same

format; however, the transmit and receive formats need not be the same. Both the transmit and receive sections

of the McASP also support burst mode, which is useful for non-audio data (for example, passing control

information between two devices).

The McASP peripheral has additional capability for flexible clock generation and error detection/handling, as well

as error management.

The device McASP0 and McASP1 modules have up to four serial data pins each. The McASP FIFO size is 256

bytes and two DMA and two interrupt requests are supported. Buffers are used transparently to better manage

DMA, which can be leveraged to manage data flow more efficiently.

For more detailed information on and the functionality of the McASP peripheral, see the Multichannel Audio

Serial Port (McASP) section of the AM437x ARM Cortex-A9 Microprocessors (MPUs) Technical Reference

Manual (SPRUHL7).

Specifications

219

Submit Documentation Feedback

Product Folder Links: AM4376 AM4377 AM4378 AM4379

AM4376 Datasheet(PDF) 219 Page - Texas Instruments