Digital Voice Systems AMBE-2000 - Page 6

AMBE-2000™ Vocoder Chip Users Manual
Version 4.92, June, 08
DVSI Confidential Proprietary, Subject to Change Page 6
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5.2.8 Framed Input: Word 10 : DTMF Control 30
5.2.9 Framed Input: Word 11 : Control Word 2 32
5.2.10 Framed Input: Words 12-23 : Channel Data 32
5.3 Framed Output 33
5.3.1 Framed Output: Word 0 : Header 33
5.3.2 Framed Output: Word 1 : Power Control ID 33
5.3.3 Framed Output: Word 1 : Control Word 1 33
5.3.4 Framed Output: Words 2-6 : Rate Information 34
5.3.5 Framed Output: Word 7 : Bit Error Rate 34
5.3.6 Framed Output: Word 8 : Soft Decision Distance 34
5.3.7 Framed Output: Word 9 : Detected Bit Errors 34
5.3.8 Framed Output: Word 10 : DTMF Control 35
5.3.9 Framed Output: Word 11 : Control Word 2 36
5.3.10 Framed Output: Words 12-23 : Channel Data 37
5.4 Unframed Serial Format 37
5.4.1 Unframed Serial Output Format 37
5.4.2 Unframed Serial Input Format 37
6 A/D-D-A Interface 39
6.1 A/D-D/A Overview 39
6.2 Configuring the A/D-D/A Interface using CODEC_SEL [1-0] 39
6.3 Low Level A/D–D/A Timing 40
7 Special Functions 42
7.1 Hardware vs. Software Selection Note 42
7.2 Coding Rate Selection 42
7.3 Echo Cancellation 43
7.4 Voice Activation Detection (VAD), Comfort Noise Insertion (CNI) 44
7.5 Dual Tone Multiple Frequency, Detection and Generation 44
7.6 Normal Power and Power Saving Modes 44
7.6.1 Standard Sleep Mode 44
7.6.2 Power Down 45
7.7 Slip Enable 46
8 Appendices 50
8.1 Example A/D-D/A Usage 50
8.2 Example: Texas Instruments TLV320AIC10 Usage 51
8.3 Configuring the AD73311 for 3-Volt Operation 55
8.4 Interfacing to the Texas Instruments PCM3500 Codec 58
8.5 Expanded Tone Detection and Generation 61
8.6 Soft Decision Decoding 61
8.7 Special Rate 2350 bps Voice / 50 bps FEC AMBE-1000™ Vocoder Chip Compatible Mode 64