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AMBE-3000F™ Vocoder Chip Users Manual
Version 3.4, April, 2014
3.
9.8
Low Power Mode when using the McBSP Codec Interface............................................................................27
3.9.9 Low Power Mode when using the SPI Codec Interface..................................................................................28
3.9.10 Low Power Mode when using the Parallel Packet Interface.........................................................................28
3.9.11 Additional Requirements when Low Power Mode is enabled........................................................................28
3.9.12 Typical AMBE-3000F™ Vocoder Chip Power Measurements:....................................................................28
4 INITIAL DESIGN CONSIDERATIONS..............................................................................30
4.1 Vocoder Speech and FEC Rate Selection..............................................................................................30
4.2 Interface Selection...................................................................................................................................30
4.3 A/D – D/A Codec chip Selection..............................................................................................................31
4.4 Vocoder State..........................................................................................................................................31
4.5 Special Functions Description.................................................................................................................32
4.5.1 Voice Activity Detection & Comfort Noise Insertion......................................................................................32
4.5.2 Echo Canceller (EC_ENABLE TQFP pin120 BGA pin D5)...........................................................................32
4.5.3 DTMF Dual Tone Multiple Frequency, Detection and Generation................................................................33
4.5.4 Soft Decision Error Correction.......................................................................................................................33
4.5.5 Skew Control (SK_ENABLE TQFP pin 6 BGA pin D3) .................................................................................34
4.5.6 Noise Suppressor (NS_ENABLE TQFP pin 7 BGA pin D2)...........................................................................34
4.5.7 Companding Using A-Law and µ-Law ...........................................................................................................34
5 I/O MANAGEMENT...........................................................................................................35
5.1 Operating Modes Introduction.................................................................................................................38
5.2 Codec mode ............................................................................................................................................39
5.2.1 Timing of channel transmit packets in Codec Mode.......................................................................................40
5.2.2 Timing of channel receive packets in Codec Mode.........................................................................................41
5.2.3 I/O Handler in Codec Mode............................................................................................................................42
5.3 Packet Mode............................................................................................................................................43
5.3.1 I/O Handler In Packet Mode...........................................................................................................................44
5.4 Switching between codec mode and packet mode using packets..........................................................45
5.5 SPI Interface............................................................................................................................................46
5.6 UART Interface........................................................................................................................................47
5.6.1 UART_TX Pin State ........................................................................................................................................48
5.7 McBSP Interface......................................................................................................................................48
5.7.1 McBSP Selected for Codec Interface..............................................................................................................48
5.7.2 McBSP Selected for Packet Interface .............................................................................................................49
5.8 Parallel Interface......................................................................................................................................51
5.8.1 Parallel Port Packet Interface........................................................................................................................51
5.9 Codec A/D / D/A Interface.......................................................................................................................53
5.10 Vocoder Front End Requirements...........................................................................................................53
5.11 Interfacing a codec to the AMBE-3000F™ Vocoder chip........................................................................55
5.11.1 The Texas Instruments General purpose TLV320AIC14 ...............................................................................55
5.11.2 The Texas Instruments PCM3500 General purpose codec............................................................................56
6 DATA AND CONFIGURATION PACKETS.......................................................................58
6.1 Overview..................................................................................................................................................58
6.2 Codec Mode Operation ...........................................................................................................................58
(Subject to Change) Page vi
DVSI CONFIDENTIAL PROPRIETARY
- AMBE-3000F™ Vocoder Chip 1
- DVSI Confidential Proprietary 1
- (Subject to Change) Page v 5
- (Subject to Change) Page x 10
- 1 Product Introduction 11
- 1.3 Typical Applications 12
- 2 Hardware Information 13
- 2.2 Package Details 14
- (Subject to Change) Page 5 15
- 2.3 Pin Assignment Layouts 16
- A B C D E F G H J K L M N P 17
- (Subject to Change) Page 8 18
- (Subject to Change) Page 9 19
- 2.5 Pin Out Table 20
- PARITY_ENABLE 79 22
- Input Enable parity bit 22
- Table 1 Pinout List 26
- 2.7.1 External Clock Source 29
- 2.7.2 Crystal Oscillator 29
- Table 7 Voltage Supply Pins 32
- 3.6 Reset Behavior 33
- Figure 11 TX_RDY after Reset 34
- Figure 12 Output Levels 34
- 3.8 Power-Down Sequencing: 35
- 3.9 Low Power Modes 35
- 3.9.1 Run State 36
- 3.9.2 Idle State 36
- 3.9.3 Standby State 36
- 3.9.4 Halt State 36
- 3.9.5 Power Modes 37
- 4.2 Interface Selection 40
- 4.4 Vocoder State 41
- Figure 18 Typical Echo Path 43
- Table 11 Companding Control 44
- 5 I/O Management 45
- Table 13 ECMODE_IN Flags 46
- Table 14 ECMODE_OUT FLAGS 46
- Table 15 DCMODE_IN Flags 47
- Table 16 DCMODE_OUT Flags 47
- 5.2 Codec mode 49
- “0 to Transition”“1” 51
- “Packet_ _Zone”Uncertainty 51
- “aperiodic packets” 52
- 5.3 Packet Mode 53
- Figure 29 Packet Mode 55
- 5.5 SPI Interface 56
- 5.6 UART Interface 57
- 5.7 McBSP Interface 58
- 5.8 Parallel Interface 61
- Table 26 PPT Timing 62
- Figure 36 Vocoder Front End 64
- Diagram 66
- 6.1 Overview 68
- 6.2 Codec Mode Operation 68
- 6.3 Packet Mode Operation 68
- 6.4 Packet Interfaces 69
- 6.5 Packet Format 69
- 6.5.3 TYPE (1 byte) 70
- 6.5.4 Packet Fields 70
- Table 59 PKT_CODECSTOP Field 78
- Table 61 PKT_CHANFMT Field 79
- samples dcmode 80
- Table 64 PKT_SPCHFMT Field 80
- 0x54 0x46 0x00 81
- Table 71 PKT_READY Field 82
- Table 72 PKT_HALT Field 82
- Table 73 PKT_RESET Field 82
- 6.7.1 Speech Packet Fields 89
- Table 100 CMODE Field Format 90
- Table 103 TONE Field Format 90
- 6.11 Example Packets 94
- 7 Appendices 98
- Table 115 Rate Index Numbers 100
- 8 Support 103
- Digital Voice Systems, Inc 104
- 10 IC Chip Software Errata 107
- Release 007 09/10/2009 108
- Release 014 08/31/2012 108
- 11 History of Revisions 109
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