Contents
Preface ............................................................................................................................... 9
1 Description .............................................................................................................. 11
1.1 Introduction—PCM3793A/94A .................................................................................. 12
1.1.1 Key Features .............................................................................................. 12
1.2 Pin Assignments and Terminal Functions...................................................................... 14
1.3 DEM-DAI3793A/3794A EVM Description ...................................................................... 15
2 Getting Started ......................................................................................................... 17
2.1 Electrostatic Discharge Warning ................................................................................ 18
2.2 Unpacking the EVM ............................................................................................... 18
2.3 Default Configuration ............................................................................................. 19
3 Set-Up Guide ........................................................................................................... 21
3.1 Basic Operating Set-Up .......................................................................................... 22
3.2 Software Control and Operation ................................................................................. 22
3.2.1 User Interface Panel ..................................................................................... 22
3.2.2 Power On/Off Sequence ................................................................................ 23
3.2.3 Module Function Controls ............................................................................... 23
3.2.4 LC89052T (DIR: Digital Audio I/F Receiver) Control Window ...................................... 39
3.2.5 Register Setting History ................................................................................. 40
3.2.6 Register Direct Access .................................................................................. 42
4 Switches and Connectors .......................................................................................... 43
4.1 Overview ............................................................................................................ 44
4.2 Motherboard ....................................................................................................... 44
4.3 Daughter Card #1 (PCM3793A) ................................................................................. 46
4.4 Daughter Card #2 (DIR: LC89052T and DIT: DIT4096) ..................................................... 48
5 Evaluation and Measurements ................................................................................... 49
5.1 Slave Mode With Audio Precision SYS-2722 (Default Setting) ............................................. 50
5.2 Master Mode with Audio Precision SYS-2722 ................................................................. 52
5.3 Combined Master and Slave Modes With PSIA-2722 ........................................................ 54
5.4 Measurements for Dynamic Characteristics ................................................................... 55
5.4.1 Digital-to-Analog (D/A) Performance .................................................................. 56
5.4.2 Analog-to-Digital (A/D) Performance .................................................................. 57
5.4.3 Speaker Output Power Performance .................................................................. 57
5.4.4 Amplitude Versus Frequency Performance ........................................................... 59
5.5 Connection Diagram for Practical Applications ................................................................ 61
5.5.1 Filter Consideration for Speaker Output ............................................................... 62
6 Schematic, PCB Layout, and Bill of Materials ............................................................... 63
6.1 Schematics ......................................................................................................... 64
6.2 Printed Circuit Board Layout ..................................................................................... 66
6.3 Component List .................................................................................................... 71
A Reference .csv Files, Interfacing to DSPs, and Package Information ............................... 73
A.1 Reference .csv Files .............................................................................................. 74
A Related Signal Flow Diagrams ......................................................................... 75
SBAU127 – July 2007 Contents 3Submit Documentation Feedback