Digital Voice Systems AMBE-3000 Especificações Página 33
- Página / 111
- Índice
- MARCADORES
Avaliado. / 5. Com base em avaliações de clientes
AMBE-3000F™ Vocoder Chip Users Manual
Version 3.4, April, 2014
Electrical Characteristics and
Requirements
1.8 V
supply voltage should not reach 0.3 V until 3v3 has reached 2.5 V. This ensures the reset signal from the I/O pin has
propagated through the I/O buffer to provide power-on reset to all the modules inside the device.
In other words, 3.3-V and 1.8-V can ramp together.
3.6 Reset Behavior
To avoid startup latency problems the system should be designed to supply a cascading reset. This means that once the system
host processor is fully functional it should bring the AMBE-3000™ Vocoder Chip out of reset using RESETn signal. The
AMBE-3000™ Vocoder Chip should then supply the CODEC_RESETn signal to bring the codec out of reset. Employing
reset in this cascading fashion will allow each device to be up and running in proper sequence so that no data is lost.
RESETn
AMBE-3000™
AMBE-3000™
Pin
60 (P10)
RESET*
CODEC_RESETn
Host
Processor
Host
Processor
Codec
Codec
Pin
113 (D6)
RESET*
Figure 10 Cascading Resets
Care should be taken with the AMBE-3000™ Vocoder Chip RESET pin (LQFP pin 113, BGA pin D6). The RESET pin is
considered an I/O port and will function as such when a SOFT RESET packet (PKT_RESET or PKT_RESETSOFTCFG) is
sent to the device. This means that when a SOFT RESET packet is issued, the AMBE-3000™ Vocoder Chip will pull the
RESET pin low for a short period of time (approximately 20 µsec). The designer should avoid having the AMBE-3000™
Vocoder Chip’s RESET pin be shared on the system reset line or a reset with other components on the board if there is a
chance that a SOFT RESET may be called for in the design.
3.6.1 Reset to Ready Packet Timing
RESET release to PKT_ READY is 20 msec MAX, 17 msec TYPICAL.
SOFT reset to PKT_READY = ~ 7 msec
3.6.2 Behavior of RTSn and TX_RDY following a RESET
Following a RESET, there is a short period where the TX_RDY signal is set high by the AMBE-3000. During this short period
reading of the TX_RDY should be avoided. The TX_RDY hold off period is approximately 1 msec following a reset.
(Subject to Change) Page 23
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
© 2020, manymanuals-pt.com. Todos os direitos reservados. | 0.044 s |
Manymanuals.com
Manymanuals.de
Manymanuals.fr
Manymanuals.it
Manymanuals.pl
Manymanuals.cz
Manymanuals.es
Manymanuals-pt.com
Comentários a estes Manuais