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AMBE-3000F™ Vocoder Chip Users Manual
Version 3.4, April, 2014
Dat
a and Configuration Packets
Table 90 PKT_DELAYNUS Field Format
PKT_DELAYNUS Response field (2 bytes) this field indicates that the PKT_DELAYNUS packet was received without
error.
PKT_DELAYNUS Response Field - Format
Field Identifier Response Field Data
1 Byte 1 Byte
0x49
0x00
(anything different indicates error)
Table 91 PKT_DELAYNUS Response Field
PKT_DELAYNNS field (3 bytes total) This field specifies the amount of delay in nanoseconds prior to processing the next
control field.
PKT_DELAYNNS Field - Format
Field Identifier Control Field Data
1 Byte 2 Bytes
0x4A Number of nanoseconds delay
Table 92 PKT_DELAYNUS Field Format
PKT_DELAYNNS Response field (1 byte) this field indicates that the PKT_DELAYNNS packet was received without error.
PKT_DELAYNNS Response Field - Format
Field Identifier Response Field Data
1 Byte 1 Byte
0x4A
0x00
(anything different indicates error)
Table 93 PKT_DELAYNNS Response Field
PKT_RTSTHRESH field (5 bytes total) This field can be used to set the number of threshold high and threshold low free
space bytes in the receive buffer.
PKT_RTSTHRESH Field - Format
Control Fields Data
Field Identifier
thresh_hi thresh_lo
1 Byte 2 Bytes 2 Bytes
0x4E
Table 94 PKT_RTSTHRESH Field Format
The Ready-To-Send (RTSn) pin is output by the AMBE-3000F™ Vocoder Chip. The output is active low. The signal is used
by the AMBE-3000F™ Vocoder Chip to control the flow of packet data to the AMBE-3000F™ Vocoder Chip. The AMBE-
3000F™ Vocoder Chip has a receive buffer where incoming packets are stored until they have been processed. When RTSn is
low, the AMBE-3000F™ Vocoder Chip indicates that it is ready to receive packet data. When RTSn is high, the AMBE-
3000F™ Vocoder Chip is not ready to receive packet data. The AMBE-3000F™ Vocoder Chip sets RTSn high if there are
less than thresh_hi bytes of free space in the receive buffer. The AMBE-3000F™ Vocoder Chip sets RTSn low if there are
more than thresh_lo bytes of free space in the receive buffer. By default, after reset thresh_hi is set to 20 and thresh_lo is set to
40. These thresholds can be changed by sending a PKT_RTSTHRESH field as part of a control packet after reset. The
(Subject to Change) Page 77
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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