User guide

4 DSPAUDIOEVM Evaluation Board Users Manual MOTOROLA
This document contains information on a new product. Specifications and information herein are subject to change without notice.
SECTION 2 MOTHERBOARD
2.1 Introduction
This section will define the motherboard and daughterboard jumper and switch functionality including their
default setting. The jumpers allow flexibility to re-route signals throughout the board and only the simple
jumper settings will be covered in this documentation. More advanced EVM users will be able to experiment
with alternate configurations using this section in conjunction with the schematic included in Appendix A.
The default jumper settings are indicated with the dark gray boxes.
2.2 Configuration Jumpers
2.2.1 JP1/JP2 - S/PDIF Transmitter Output
The JP1 and JP2 headers are designed to allow selection of the S/PDIF output sources driven by the
daughterboard (DSP), AKM 4101 S/PDIF transmitter, or AKM 4114 S/PDIF receiver. The DSP option on
these jumpers is for future flexibility to allow for multiple S/PDIF signals to be sourced from the
daughterboard directly. One of the S/PDIF signals (TXSD4, TXSD5, or TXSD6) can be directed to the TX4
output by selecting it, using JP2 and selecting the 4101TX4 option in the TX4 section of JP1. The 4114TX
jumper option on TX4 is to allow direct connection of the S/PDIF receiver relay to S/PDIF out. The ADO
jumper option on TX1 allows the S/PDIF transmitter (DAX port) of certain DSPs to be connected to the S/
PDIF output connector.
2.2.2 JP3/JP4 – S/PDIF Receiver Input
The JP3 jumper allows for hardware configuration of the AKM 4114 S/PDIF receiver. The default setting is
for software control mode and the AKM 4114 is configured by the Motorola HC908GP32 configuration
microcontroller on the motherboard.
The JP4 jumper controls the S/PDIF receiver input source to allow direct routing to the daughterboard using
the DSP setting or selecting connection to the AKM 4114 (default).
Table 2.1 JP1 / JP2 – S/PDIF Transmitter Output
TX1 TX2 TX3 TX4 4101TX4
* * * * * * * * * * * * *
* * * * * * * * * * * * *
ADO
DSP
4101
DSP
4101
DSP
4101
DSP
4101TX4
4114TX
TXSD4
TXSD5
TXSD6
JP1 JP2
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cale Semiconductor,
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