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AMBE2000 数据表(PDF) 11 Page - List of Unclassifed Manufacturers |
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AMBE2000 数据表(HTML) 11 Page - List of Unclassifed Manufacturers |
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11 / 47 page  AMBE-2000™ Vocoder Chip User’s Manual Version 3.0 page 11 Visit us at www.dvsinc.com Confidential Proprietary, Subject to Change 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 84 CODEC_SEL0 Input A/D-D/A Select Pins see Table 6-A to select the interface. 74 RATE_SEL4 Input 73 RATE_SEL3 Input 72 RATE_SEL2 Input 71 RATE_SEL1 Input 70 RATE_SEL0 Input Coding Rate Select Pins : Use these bits to select the voice and FEC rates according to section 7.2. The coding rates are also selectable using the Control Word interface described in section 5.2.4. 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 20 EPR Output Encode Packet Ready: Following a reset, this signal will have a high to low transition to 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 81 BAUD_SEL1 Input Baud Rate Selector for unformatted serial mode See Table TBDL 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 |
类似零件编号 - AMBE2000 |
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类似说明 - AMBE2000 |
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