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PDF AMBE2000 Data sheet ( Hoja de datos )
| Número de pieza | AMBE2000 | |
| Descripción | VOCODER CHIP | |
| Fabricantes | ETC | |
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Version 3.0
1 page  
AMBE-2000™ Vocoder Chip
User’s Manual Version 3.0
5.2.8 Formatted Input : Word 10 :DTMF Control
5.2.9 Formatted Input : Word 11 Control Word 2
5.2.10 Formatted Input : Words 12-23 : Channel Data
5.3 Formatted Output Format
5.3.1 Formatted Output : Word 0 : Header
5.3.2 Formatted Output : Word 1 : ID (Power Control)
5.3.3 Formatted Output : Word 1 :Control Word 1
This 8-bit control word indicates the activity of various functions.
5.3.4 Formatted Output : Words 2-6 : Rate Info 0, Rate Info 1, Rate Info 2, Rate Info 3, Rate Info 4.
5.3.5 Formatted Output: Word 7 : Bit Error Rate
5.3.6 Formatted Output : Word 10 : DTMF Control
5.3.7 Formatted Output : Word 11 :Control Word 2
5.3.8 Formatted Output : Words 12-23 :Channel Data
5.4 Unformatted Serial Format
5.4.1 Unformatted Serial Output Format
5.4.2 Unformatted Serial Input Format
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6 A/D-D-A Interface
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6.1 A/D-D/A Overview
6.2 Configuring the A/D-D/A Interface using CODEC_SEL[1-0]
6.3 Low Level A/D–D/A Timing
Low Level Timing for A/D-D/A in Active and Passive Modes
7 Special Functions
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7.1 Hardware vs. Software Selection Note
7.2 Coding Rate Selection
7.3 Echo Cancellation
7.4 Voice Activation Detection (VAD), Comfort Noise Insertion (CNI)
7.5 Dual Tone Multiple Frequency, Detection and Generation
7.6 Normal Power and Power Saving Modes
7.6.1 Standard Sleep Mode
7.6.2 Power Down
7.7 Slip Enable
8 Appendices
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8.1 Example A/D-D/A Usage
8.1.1 AD73311
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page 5
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5 Page 
AMBE-2000™ Vocoder Chip
User’s Manual Version 3.0
3.2 Pin Descriptions
Pin Number Pin Descriptive Name Pin Direction Notes
77
CHANN_SEL1
Input
Channel Interface Selection Pins : Use these bits to select the channel interface type
(formatted,unformatted active, passive) according to Table 4-A. See full description in
section 4.2.
75
CHANN_SEL0
Input
Used with CH_SEL1 to select channel operation mode
85 CODEC_SEL1 Input
A/D-D/A Select Pins see Table 6-A to select the interface.
84 CODEC_SEL0 Input
74 RATE_SEL4 Input
73 RATE_SEL3 Input
Coding Rate Select Pins : Use these bits to select the voice and FEC rates according to
72
RATE_SEL2
Input
section 7.2. The coding rates are also selectable using the Control Word interface
described in section 5.2.4.
71 RATE_SEL1 Input
70 RATE_SEL0 Input
86
VAD_EN
Input
Voice Activation Detection Enable Pin. Active HIGH. See Section 7.4. VAD can also be
enabled/disabled using the Control Word interface as described in section 5.2.9.
78
ECHOCAN_EN
Input
Echo Canceller Enable Pin. Active HIGH. See Section 7.3. The Echo Canceller can also
be enabled/disabled using the Control Word interface as described in section 5.2.9.
83
SLEEP_EN
Input
Standard Sleep Enable Pin. Active HIGH. See Section 7.6.1.
82
SLIP_EN
Input
Slip Control Enable Pin. Active HIGH. See Section 7.7.
68
X2/CLKIN
Input
Clock Input 1. 16.384 Mhz input. See Section 3.4
67
X1
Input
Output from internal oscillator for the crystal. If the internal oscillator is not used this pin
should be unconnected.
69
RESETN
Input
AMBE-2000 Reset pin. Active LOW. See Section 3.3
Encode Packet Ready: Following a reset, this signal will have a high to low transition to
20
EPR
Output
indicate the first packet is ready. The next packet will be ready approximately 20 msec
later. See Note 1.
79
SOFT_EN
Input
Soft decision decoding enable. Enables 4 bit soft decision error decoder.
80 BAUD_SEL0 Input
Baud Rate Selector for unformatted serial mode See Table TBDL
81 BAUD_SEL1 Input
32
CHAN_RX_DATA
Input
Channel Receive Data to AMBE-2000
42
CHAN_TX_DATA
Output
Channel Transmit Data from AMBE-2000
28
CHAN_RX_CLK
Input
Channel Receive Clock
34
CHAN_TX_CLK
Input
Channel Transmit Clock
38 CHAN_TX_STRB
I/O Channel Transmit Frame Synchronization Pulse
30
CHAN_RX_STRB
Input
Channel Receive Frame Synchronization Pulse
29
CODEC_RX_STRB
Input
Frame synchronization pulse for A/D data. Should be connected to CODEC_TX_STRB
37
CODEC_TX_STRB
Input
Frame synchronization pulse for D/A data. Should be connected to CODEC_RX_STRB
31
CODEC_RX_DATA
Input
PCM Data from A/D Conveter to AMBE-2000
page 11
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11 Page | ||
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| PDF Descargar | [ Datasheet AMBE2000.PDF ] | |
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