User's Manual

CU MU
CU is the Central Unit or the wireless audio transmitter.
MU is the Mobile of the wireless audio receiver.
Stream enable
Stream is the digital audio channel between the 3141 130 0034.1 and the MAXIM radio chip.
Pipe is the digital audio channel between the 3141 130 0034.1 and the Wolfson Audio Codec and S/PDIF.
By default, stream A, B, C, D are mapped to Pipe W, X, Y and Z directly.
Stream A should always be enabled at the CU.
E.g. Use Stream A and B in 2 Speaker ACK/NACK.
Use Stream A and B (or C or D) in 4 Speaker in ACK/NACK.
Use Audio Snooze (No Audio -> RF Off)
This enables the CU to detect for the availability of audio signal at the input from the audio source.
If no audio source is detected for 5 seconds, CU will enter Audio Snooze Mode and the LINK LED
will turn off. Likewise, when CU enters Audio Snooze Mode, the MU will automatically enter
Power Down Duty Cycle Mode PDDCM. In these modes, MAXIM radio chip is put to sleep.
If audio source is detected at the CU while in Audio Snooze Mode, 3141 130 0034.1 wakes up the
MAXIM radio chip and LINK LED turns on again. MU will also recover from PDDCM.
By default, audio snooze is enabled.
Use Power-on Sniffer
This enables the CU to sniff or check for the best RF channel to communicate with the MU(s),
upon power up.
This feature is intended for co-existence with other 2.4 GHz wireless communication devices
using IEEE802.11b/g WLAN, Bluetooth, DECT and microwave ovens.
By default, power-on sniffer is enabled.
Use SPDIF
This enables the evaluation board to accept SPDIF digital audio signal. The CU will only accept
SPDIF input, whereas the MU will only accept SPDIF output.
See 2.1 CU Custom Settings and 2.2 MU Custom Settings.
By default, I
2
S is used between the Wolfson Audio Codec and 3141 130 0034.1, hence CU will accept
audio signal from Channel A/B, whereas MU will produce audio signal to Channel A/B.
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