User guide

MOTOROLA DSPAUDIOEVM Evaluation Board Users Manual 3
This document contains information on a new product. Specifications and information herein are subject to change without notice.
1.8 Running the Passthru Code
The daughterboards are shipped with a simple piece of audio passthru code stored in the on-board flash.
The SW1 switch on the daughterboard controls the DSP boot modes, to enable pass-thru mode switch
MODA "on" and MODB "off" on the DSP daughtercard. Switching MODA "off" and MODB "on" will disable
pass-thru mode but will enable use of the SDI debugger. (For more information, refer to the individual DSP
users manuals, as well as Table 3.1 and Table 3.2.)
For the above mentioned passthru function the source device is selected by setting the jumpers of JP11
(AUX in). The default setting from the factory configures the system to source audio data from the optical
RX1 S/PDIF input. Alternate settings are described in the Motherboard Configuration section of this manual.
The DSP passthru software passes the audio sourced from the selected input to the first 4 stereo analog
outputs. You can listen to these outputs by connecting an external amplifier and speaker to the RCA outputs
or by using the built-in headphone amplifier. To use the headphone output select the desired analog output
signals using the left and right channel select switches (SW2/SW3) and adjust the left and right volume
sliders (RV3/RV4).
Frees
cale Semiconductor,
I
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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