AT2004 datasheet(19/25 Pages) ETC1

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AT2004

4 Channels ADPCM Processor with Echo Cancellation and Conferencing

Page 19 of 25

// 2 channel high byte. Conferencing with Chan 0.

// 2 channel low byte. Conferencing with Chan 1 and Chan 4.

// 3 channel high byte. Conferencing with Chan 4.

// 3 channel low byte. Conferencing with Chan 5 and Chan 6.

// 4 channel high byte

// 4 channel low byte

// 5 channel high byte

// 5 channel low byte

// 6 channel high byte. Conferencing with Chan 0.

// 6 channel low byte. Conferencing with Chan 1 and Chan 5.

// 7 channel high byte. Conferencing with Chan 4.

// 7 channel low byte. Conferencing with Chan 5 and Chan 0.

Command bytes specifying per channel control

// Begin per channel control. This byte is fixed.

// begin at 0 channel. This byte is usually fixed (usually begin specifying at 0).

// 0 channel high byte.

// 0 channel low byte.

// 1 channel high byte.

// 1 channel low byte.

// 2 channel high byte.

// 2 channel low byte.

// 3 channel high byte.

// 3 channel low byte.

// 4 channel high byte.

// 4 channel low byte.

// 5 channel high byte.

// 5 channel low byte.

// 6 channel high byte.

// 6 channel low byte.

// 7 channel high byte.

// 7 channel low byte.

Command bytes specifying mcu7byte definition.

// begin mcu7byte definition.

D0 // [7]: input; [6]:output; 0==X; 1==Y, channel 0, yin-yout

// Algorithm Setup, default value = 5EH for expand

// Delay

// Begin input slot bit, ADPCM

// End input slot bit, ADPCM

// Begin output slot bit, PCM

// End output slot bit, PCM

// [7]: input; [6]:output; 0==X; 1==Y, channel 1, yin-yout

// Algorithm Setup, default value = 5EH for expand

// Delay

// Begin input slot bit, ADPCM

// End input slot bit, ADPCM

// Begin output slot bit, PCM

// End output slot bit, PCM

// [7]: input; [6]:output; 0==X; 1==Y, channel 2, yin-yout

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