Digital Voice Systems AMBE-3000 Specifications Page 35
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AMBE-3000™ Vocoder Chip Users Manual
Version 2.8, August, 2011
Electrical Characteristics and
Requirements
Figure 13 Power Modes
The AMBE-3000™ Vocoder Chip outputs three signals that are related to its current power state. The STANDBYn (TQFP pin
44 / BGA pin M6) signal goes low whenever the AMBE-3000™ Vocoder Chip is in the Standby State, otherwise the signal is
high. The IDLEn (TQFP pin 45 / BGA pin P6) signal is low whenever the AMBE-3000™ Vocoder Chip is in the Idle State,
otherwise the signal is high. The RUNn (TQFP pin 61 / BGA pin P11) signal is low whenever, either the encoder or the
decoder is running, otherwise the signal is high.
3.8.6 Low power mode when using the UART Packet Interface
When the UART packet interface is used and low-power mode is enabled, PKT_RX_WAKE (TQFP pin 43 / BGA pin M5)
must be connected to UART_RX (TQFP pin 112 / BGA pin A7). The signal is used to make sure that the standby state is not
entered while UART_RX is active.
3.8.7 Low Power Mode when using the McBSP Packet Interface
When the McBSP packet interface is used the PKT_RX_WAKE (TQFP pin 43 / BGA pin M5) signal must be connected to the
inverted McBSP_FSR signal (TQFP pin 24 / BGA pin J2). The signal is needed in order to wake the chip from the standby
state.
3.8.8 Low Power Mode when using the McBSP Codec Interface
When the McBSP codec interface is used the SPI_WAKE (TQFP pin 106 / BGA pin D9) signal must be connected to the
inverted McBSP_FSR signal (TQFP pin 24 / BGA pin J2). The signal is needed in order to wake the chip from the standby
state.
Note: The higher the frequency of the MCBSP clock the better power consumption will be when low-power mode is enabled.
3.8.9 Low Power Mode when using the SPI Codec Interface
When the SPI codec interface is used the SPI_WAKE (TQFP pin 106 / BGA pin D9) signal must be connected to the inverted
frame sync signal from the codec. The signal is needed in order to wake the chip from the standby state.
3.8.10 Low Power Mode when using the Parallel Packet Interface
No additional connections are required to use low power mode with the parallel interface.
(Subject to Change) Page 25
DVSI CONFIDENTIAL PROPRIETARY
- AMBE-3000™ 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 25
- 2.7.1 External Clock Source 28
- 2.7.2 Crystal Oscillator 29
- Digital Voice Systems, Inc 30
- Table 7 Voltage Supply Pins 31
- 3.7 Power-Down Sequencing: 32
- 3.8 Low Power Modes 33
- 3.8.1 Run State 34
- 3.8.2 Idle State 34
- 3.8.3 Standby State 34
- 3.8.4 Halt State 34
- 3.8.5 Power Modes 34
- Figure 13 Power Modes 35
- 4.2 Interface Selection 37
- Figure 15 Typical Echo Path 39
- Table 11 Companding Control 41
- 5 I/O Management 42
- Table 13 ECMODE_IN Flags 43
- Table 14 ECMODE_OUT FLAGS 43
- Table 15 DCMODE_IN Flags 44
- Table 16 DCMODE_OUT Flags 44
- 5.1 Operating Modes 45
- 5.1.3 Packet Mode 47
- Figure 20 Packet Mode 49
- 5.2 SPI Interface 50
- 5.3 UART Interface 51
- 5.4 McBSP Interface 52
- 5.5 Parallel Interface 55
- Table 26 PPT Timing 56
- Figure 27 Vocoder Front End 57
- Diagram 59
- 6.1 Overview 61
- 6.2 Codec Mode Operation 61
- 6.3 Packet Mode Operation 61
- 6.4 Packet Interfaces 62
- 6.5 Packet Format 62
- 6.5.3 TYPE (1 byte) 63
- 6.5.4 Packet Fields 63
- Table 59 PKT_CODECSTOP Field 71
- Table 61 PKT_CHANFMT Field 71
- samples dcmode 72
- Table 71 PKT_READY Field 74
- Table 72 PKT_HALT Field 74
- Table 73 PKT_RESET Field 74
- 6.7.1 Speech Packet Fields 81
- Table 100 CMODE Field Format 82
- Table 103 TONE Field Format 82
- 6.11 Example Packets 86
- 7 Appendices 90
- Table 115 Rate Index Numbers 92
- 8 Support 95
- 10 IC Chip Software Errata 99
- Release 007 09/10/2009 100
- 11 History of Revisions 101
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