User's Manual

SAM-200-TR Steaming Audio Module 6 Ver. 0.12j 12/22/2009

PRELIMINARY USER MANUAL SUBJECT TO CHANGE WITHOUT NOTICE

On the main connector, the OUT_SEL line selects between the two sets of outputs on that connector.

Audio Input Selection

OUT_SEL

Audio Output Setting

0 Headphone-level output

1 Line-level or balanced output

4. I2C Communication

The module acts as an I2C slave to support extended functionality when embedded in a product that has

microprocessor control. The module maps a number of different registers accessible through the I2C

communication. These registers allow setting of parameters that include but go beyond the functions

available directly on the pins. Current settings and immediate status may be read back through the

registers.

Please contact Aerielle for further information.

5. Tx/Rx Selection

The Tx/Rx selection pin (TX_RX) is available only on the transceiver version of the module. This pin

selects whether the module plays the role of transmitter or receiver. With no connection, the pin is

pulled high internally and the unit functions as a receiver. When this pin is pulled to ground, the module

functions as a transmitter.

On dedicated transmitter or receiver versions of the module, this pin has no function.

TX/RX SELECTION

TX_RX Module Function

1 Receiver (default)

0 Transmitter

6. Channel Selection

The module supports 8 “consumer” channels and 8 “professional” channels, intended for use in musical

instruments and other professional audio applications. The division of channel types is primarily to

prevent interference with professional audio applications by users of consumer-class devices (wireless

headphones, music-sharing platforms) at a public venue.

The CHSEL line controls the selection of the class of channels. This line is pulled up internally, and by

default (high) selects the consumer class of channels. Strap this line to ground (low) to select the

professional class of channels.

The CHSEQ line allows simple sequential selection of channels. A very simple product could use this line

to select channels by stepping through them (albeit blindly) with a single pushbutton. This type of

channel selection is very similar to cordless phones. When you encounter interference on one channel,

you push the button once to step to the next channel. When you have a pair of devices (one transmitter,

one receiver) and you change the channel on one to avoid interference, you would simply sequence the

channel button on the other device until you hear the audio link re-established. (This requires that you