2.4.3 Master/Slave Mode Operation
2.4.3.1
TAS3208EVM-LC Operation in Master Mode
2.4.3.2
TAS3208EVM-LC Operation in Slave Mode
2.4.4 Loading the Process Flow
Developing the Process Flow on the EVM
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Figure 2-1. PurePath Studio I
2
C Command File Window
The TAS3208 can be configured for both master and slave modes via the SAP/Clock register. By default,
the TAS3208 is configured for master mode. The TAS3208 can be changed to operate in slave mode by
loading the correct SAP/Clock registers settings via the configuration file.
Example master and slave configuration scripts can be found on the CD-ROM included with the
TAS3208LC Evaluation Module.
Note:
Make sure to verify check the ‘Execute on reset’ box before closing the Configuration Tool.
In master mode, the MCLK, SCLK, and LRCLK for the system are internally generated by the external
crystal. Serial Digital Audio is input in to the TAS3208EVM-LC via the Serial Digital Input header (J1).
Analog signals are input via the analog input header (J4), or the line in jack (J2).
In slave mode, MCLK, SCLK, and LRCLK for the system must be externally provided by the user’s system
controller on the serial digital input header (J1). The DSP, MCU and I
2
C clocks are still internally derived
from the external crystal. Serial Digital Audio is input in to the TAS3208EVM-LC via the Serial Digital Input
header (J1). Analog signals are input via the analog input header (J4), or the line in jack (J2).
Note:
Audio performance in slave mode depends on the quality of the I
2
S clocks. The clocks
should be buffered before the TAS3208. The lowest sampling frequency for acceptable audio
performance is slave mode is 44.1 kHz.
The process flow can be built using the TAS3208 application framework, TAS3208 I/O components, and
audio processing components.
Note:
The TAS3208 application framework must be loaded into the pallet before any other
components can be added.
The CD-ROM included with the TAS3208EVM-LC comes with a sample process flow that allows the
device to stream analog audio from input to output. This process flow can be loaded from the file menu.
File >> Open
Browse to the TAS3208.pfw using Windows Explorer and open the process flow. The TAS3208.pfw is
designed to stream an analog signal from input to output.
Quick Setup Guide
14
SLEU097 – April 2008
