AT2008 Datasheet, PDF (13/19 Pages) List of Unclassifed Manufacturers – 8 Channels ADPCM Processor

AT2008
8 Channels ADPCM Processor
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Channel 7: (encode ADPCM channel)
MCU7byte Command:
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u-Law input, 32k ADPCM algorithm.
Input time slot: @xin[32:39]
Output time slot: @xout[32:35]
Encode (i.e. output is ADPCM sample sequence)
u-Law input, 32k ADPCM algorithm.
Input time slot: @xin[48:55]
Output time slot: @xout[48:51]
The following is command sequences of per channel control and mcu7byte:
Command bytes specifying per channel control
30 // Begin per channel control. This byte is fixed.
00 // begin at 0 channel. This byte is usually fixed (usually begin specifying at 0).
00 // 0 channel high byte.
00 // 0 channel low byte.
00 // 1 channel high byte.
00 // 1 channel low byte.
00 // 2 channel high byte.
00 // 2 channel low byte.
00 // 3 channel high byte.
00 // 3 channel low byte.
00 // 4 channel high byte.
00 // 4 channel low byte.
00 // 5 channel high byte.
00 // 5 channel low byte.
00 // 6 channel high byte.
00 // 6 channel low byte.
00 // 7 channel high byte.
00 // 7 channel low byte.
Command bytes specifying mcu7byte definition.
00 // begin mcu7byte definition.
D0 // [7]: input; [6]:output; 0==X; 1==Y, channel 0, yin-yout
5E // Algorithm Setup, default value = 5EH for expand
00 //
00 // Begin input slot bit, ADPCM
03 // End input slot bit, ADPCM
00 // Begin output slot bit, PCM
07 // End output slot bit, PCM
D0 // [7]: input; [6]:output; 0==X; 1==Y, channel 1, yin-yout
5E // Algorithm Setup, default value = 5EH for expand
00 //
10 // Begin input slot bit, ADPCM
13 // End input slot bit, ADPCM
10 // Begin output slot bit, PCM
17 // End output slot bit, PCM
D0 // [7]: input; [6]:output; 0==X; 1==Y, channel 2, yin-yout
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©2001 Atelic Systems, Inc.