Digital Voice Systems AMBE-3000 Specifications download pdf (Page 49)

AMBE-3000F™ Vocoder Chip Users Manual

Version 3.4, April, 2014

O Management

5.2 Codec mode

In codec mode the speech data I/O (to/from codec) is a serial stream of samples that uses either the SPI or the McBSP interface

and the channel data is configured into data packets that are sent across either the UART, parallel port, or McBSP (when not

used as the codec interface). When using codec mode, the speech and channel data use separate interfaces. Packets containing

channel data are sent and received every 20 ms.

Figure 20 Codec Mode (SPI Interface)

(Subject to Change) Page 39

DVSI CONFIDENTIAL PROPRIETARY

1 2 ... 44 45 46 47 48 49 50 51 52 53 54 ... 110 111

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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