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© MiMOMax 2013 Four Wire Audio
Interface Manual
2.3.2
3 Channel Mode
(2 audio channels plus a data channel plus Control Header).
To provide for better bandwidth utilization in situations where only 1 or 2 audio channels are
required the Control Header is reordered to provide for the UART data channel.
Audio channels are either always on (static) or controlled via E&M signalling (dynamic). E&M
signalling requires an E-Lead signal for audio to pass.
The data channel passes COM port data as required with the nominal throughput defined by
the UART rate.
2.3.3
Fixed Channel Mode
(Audio channels only, No data, No Control Header).
To minimize bandwidth requirements only audio data is passed end to end. This places the
limitations of no COM port data and only 2 audio channels. Both channels when enabled
conform to the static configuration as no data passes to indicate their state.
2.3.4
Configuration Selector Access
Observe EMC precautions whenever enclosure is open.
To access the Configuration Selector the unit should first be powered down. The lid may then
be removed to gain access to the selector. Using a suitable tool the selector may be rotated
to the desired selection. The units at both ends of the link must be in compatible modes.
The configuration selector is a single rotary encoder placed on the PCB as shown in the
following image.
Configuration
Selector
Location of Configuration Selector
