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ZEUS Technical Manual
Detailed hardware description
© 2007 Eurotech Ltd Issue D
49
Audio
A Wolfson WM9712L AC’97 audio CODEC is used to support the audio features of the
ZEUS. Audio inputs supported by the WM9712L are stereo line in and a mono
microphone input.
The WM9712L provides a stereo line out that is amplified by a National Semiconductor
LM4880 250mW per channel power amplifier, suitable for driving an 8
Ω
load. The
WM9712L AC’97 codec may be turned off if it is not required. See the section
, page
, for details.
Connection to the ZEUS audio features is via header J4.
See the section
, for connector and mating connector
details. The table below shows pin assignments:
Function
Pin
Signal
Signal levels (max)
Frequency
response (Hz)
Microphone
10
9
7
MIC input
MIC voltage reference
output
Audio ground reference.
1Vrms
20 – 20k
Line in
1
5
3
Line input left
Line input right
Audio ground reference
1Vrms
20 – 20k
Line out
2
6
4
Line output left
Line output right
Audio ground reference
1Vrms
20 – 20k
Amp out
8
11
12
Amp output left
Amp output right
Audio ground reference
1.79V peak
1.26Vrms
(8
Ω
load) 223mW
20 – 20k
Summary of Contents for ZEUS
Page 1: ...ZEUS PXA270 RISC based EPIC Single Board Computer Technical Manual ...
Page 9: ...ZEUS Technical Manual Introduction 2007 Eurotech Ltd Issue D 9 5V input option 5V power input ...
Page 105: ...ZEUS Technical Manual Appendix E Wireless modem datasheets 2007 Eurotech Ltd Issue D 105 ...
Page 107: ...ZEUS Technical Manual Appendix E Wireless modem datasheets 2007 Eurotech Ltd Issue D 107 ...
Page 109: ...ZEUS Technical Manual Appendix E Wireless modem datasheets 2007 Eurotech Ltd Issue D 109 ...
Page 111: ...ZEUS Technical Manual Appendix E Wireless modem datasheets 2007 Eurotech Ltd Issue D 111 ...
Page 113: ...ZEUS Technical Manual Appendix E Wireless modem datasheets 2007 Eurotech Ltd Issue D 113 ...
Page 115: ...ZEUS Technical Manual Appendix E Wireless modem datasheets 2007 Eurotech Ltd Issue D 115 ...
Page 117: ...ZEUS Technical Manual Appendix E Wireless modem datasheets 2007 Eurotech Ltd Issue D 117 ...