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AMBE-3000F™ Vocoder Chip Users Manual
Version 3.4, April, 2014
Dat
a and Configuration Packets
Ex
ample of a PKT_RATEP field with the custom rate of 2800 bps voice and 0 bps FEC
Field Identifier RCW 0 RCW 1 RCW 2 RCW 3 RCW 4 RCW 5
0x0A 0x0038 0x0765 0x0000 0x0000 0x0000 0x0038
Table 45 PKT_RATEP Field Example
PKT_RATEP Response field (1 byte total) indicated receipt of custom rate words
PKT_RATEP Response- Field Format
Field Identifier Response Field Data
1 Byte 1 Byte
0x0A
0x00
(anything different indicates error)
Table 46 PKT_RATEP Response Field Format
Vocoder Rate table with Rate - Control Words / Configuration Pin Setting are shown in Section Rate - Control Words /
Co
nfiguration Pin Settings
PKT_I
NIT field (2 bytes total) sets the ecmode and dcmode initialization flags for the encoder and the decoder respectively as
well as initializes the echo canceller.
When bit 0 of byte 1 is set the encoder is initialized to the following:
TONE_DET_ENABLE_FLAG is on
Noise suppression is enabled/disabled depending on configuration pin
Echo canceller and echo suppressor are enabled/disabled depending on configuration pin or bit 2 of the PKT_INIT
control field data.
Companding is enabled/disabled and the companding type is selected depending upon the configuration pins.
All other bits in ecmode are initialized to zero.
When bit 1 of byte 1 is set the decoder is initialized to the following:
Companding is enabled/disabled and the companding type is selected depending upon the configuration pins.
All other bits in dcmode are initialized to zero.
When bits 0 and 1 of byte 1 are both set, the encoder and decoder are both initialized.
When bit 2 of the PKT_INIT field is set to 1 then the echo canceller is initialized.
PKT_INIT Field - Format
Field Identifier Control Field Data
1 Byte 1 Byte
0x0B Table 48 PKT_INIT Field - Data
Table 47 PKT_INIT Field Format
(Subject to Change) Page 65
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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