SPRA921
4 McASP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 4.1 McASP Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 4.2 TDM Synchronous Transfer Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 4.3 DIT Transfer Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 4.4 McASP clock generators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 4.5 McASP Error Handling and Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 4.6 McASP Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
5 Conclusion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 6 References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
| List of Figures |
|
Figure 1 | Digital Surround Receiver Block Diagram | 3 |
Figure 2 | Generalized High Performance Multichannel Audio System | 4 |
Figure 3 | TMS3206713 CPU and Peripheral Connectivity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 | |
| List of Tables |
|
Table 1 | C6713 Benchmark Performance | 6 |
1 Introduction
High performance, multichannel audio applications are evolving at a rapid rate. In the consumer space, many standards have been defined. For example:
•Theater and home theater surround standards including: Dolby Pro Logic (II) , Dolby Digital
(EX) ,
•Digital audio formats for portable and/or higher density (greater compression) playback:
MPEG 2 Layer 3 (MP3), AAC, MPEG 4, Microsoft Windows Media, Meridian Lossless Packing(MLP)
In addition to consumer standards, many companies are developing their own high performance multichannel audio applications. Digital technology is being applied to large venues such as stadiums, auditoriums, and movie theaters to tune the listening experience to the room acoustics. Audio broadcast, production, and recording equipment implement effects generation as well as multichannel audio mixing, equalization, enhancement, and music.
1.1System I/O
Figure 1 shows a block diagram of a digital surround receiver. Figure 2 generalizes that to many high performance multichannel audio systems. The TMS320C6713’s peripheral set enables ease of connection to the major elements of these systems. The peripheral set includes:
•Two McASPs that provide simple cost effective, connectivity to multiple serial digital audio streams
•Two Inter-IC (I2C) buses for connection to serial ROMs or to control other system interface devices like user I/O
•A dedicated general-purpose input/output (GPIO) module to provide direct control lines to system components, eliminating much of the glue logic in many designs
2TMS320C6713 Digital Signal Processor Optimized for High Performance Multichannel Audio Systems