User's Manual

SAM-200-TR Steaming Audio Module 7 Ver. 0.12j 12/22/2009

PRELIMINARY USER MANUAL SUBJECT TO CHANGE WITHOUT NOTICE

know what the audio source is playing so you can identify it on the receiver.) This line is pulled up

internally, and the channel advances each time it transitions to ground. The input is debounced internally

to allow the use of a simple electromechanical pushbutton switch.

The CH0, CH1, and CH2 lines provide for direct selection of the channel. Use these lines to select the

channel from a microcontroller or when you want to hard-wire a particular channel other than the

default. These lines are pulled up internally so they must be pulled down to select. See the following

table that shows active-low binary selection. In this way, Channel 0 (all lines high) is the default.

Channel Selection

Class Channel Address

CHSEL CH0 CH1 CH2

Channel Color*

X 1 1 1 Channel 1 (default) Red

X 1 1 0 Channel 2 Orange

X 1 0 1 Channel 3 Yellow

X 1 0 0 Channel 4 Green

X 0 1 1 Channel 5 Blue

X 0 1 0 Channel 6 Violet

X 0 0 1 Channel 7 White

X 0 0 0 Channel 8 undef.

1 X X X Consumer Class

0 X X X Professional Class

*The channel colors refer to those used on the i2i Stream

consumer device.

7. Volume Control/Mute

On the transceiver or dedicated receiver version of the module, there are simple function pins for volume

control and mute. These control the output volume in the headphone-drive mode.

• VOLUP Transition to ground increases volume at headphone outputs by one step.

• VOLDN Transition to ground decreases volume at headphone outputs by one step.

• MUTE Ground mutes headphone output and floating or high-level input un-mutes it.