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AMBE-3000F™ Vocoder Chip Users Manual
Version 3.4, April, 2014
Electrical Characteristics and
Requirements
3.9.5 Power Modes
The AMBE-3000F™ Vocoder Chip has two power modes:
(1) Normal Power Mode: In this mode the AMBE-3000F™ Vocoder Chip switches between the Run State and the Idle
State.
(2) Low Power Mode: In this mode the AMBE-3000F™ Vocoder Chip switches between the Run State, the Idle State,
and the Standby State. Lower power is consumed because the AMBE-3000F™ Vocoder Chip is in the Standby state
a large percentage of the time. low power mode is enabled or disabled by sending a packet containing
PKT_LOWPOWER field to the AMBE-3000F™ Vocoder Chip. After reset, low power mode is always disabled.
Figure 16 Power Modes
The AMBE-3000F™ 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-3000F™ 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-3000F™ 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.
3.9.6 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.
3.9.7 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.
3.9.8 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.
(Subject to Change) Page 27
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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