Texas Instruments TLV320AIC3107EVM-K quick start Audio Input/ADC Tab

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TLV320AIC3107EVM Software

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4.3Audio Input/ADC Tab

Figure 6. Audio Input/ADC Tab

The Audio Input/ADC tab allows control of the analog input mixer and the ADC. The controls are displayed to look similar to an audio mixing console (see Figure 6). Each analog input channel has a vertical strip that corresponds to that channel. By default, all inputs are muted when the TLV320AIC3107 is powered up.

To route an analog input to the ADC:

1.Select the Input Mode button to correctly show if the input signal is single-ended (SE) or fully-differential (Diff). Inputs that are single-ended must be made to the positive signal terminal.

2.Click on the button of the analog input channel that corresponds to the correct ADC. The caption of the button changes to Active. Note that the user can connect some channels to both ADCs, whereas others only connect to one ADC.

3.Adjust the Level control to the desired attenuation for the connected channel. This level adjustment can be done independently for each connection.

The TLV320AIC3107 offers a programmable microphone bias that can either be powered down, set to 2 V, 2.5 V, or the power supply voltage of the ADC (AVDD_ADC). Control of the microphone bias (mic bias) voltage is accomplished by using the Mic Bias pulldown menu button above the last two channel strips. To use the onboard microphone, hardware jumpers W10 and W11 must be installed. Nothing must be plugged into J9, in order for the mic bias settings in the software to take effect. Also, jumper W9 (Mic Bias Sel) must be set to connect positions 2 and 3, so that MICBIAS is controlled by the TLV320AIC3107.

Also shown are controls for Weak Common Mode Bias. Enabling these controls results in unselected inputs to the ADC channels to be weakly biased to the ADC common mode voltage.

Nearby are the controls for the ADC PGA, including the master volume controls for the ADC inputs. Each channel of the ADC can be powered up or down as needed using the Power Up buttons. PGA soft-stepping for each channel is selected using the pulldown menu control. The two large knobs set the actual ADC PGA Gain and allow adjustment of the PGA gains from 0 dB to 59.5 dB in 0.5-dB steps (excluding Mute). At the extreme counterclockwise rotation, the channel is muted. Rotating the knob clockwise increases the PGA gain, which is displayed in the box directly above the volume control.

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TLV320AIC3107EVM-K

SLAU261–November 2008

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Contents EVM-Compatible Device Data Sheets TLV320AIC3107EVM-KUSB-MODEVM SW2 Settings Features TLV320AIC3107EVM-K Block DiagramEVM Overview IntroductionTLV320AIC3107EVM-K Block Diagram USB-MODEVM Interface BoardDefault Configuration and Connections USB-MODEVM SW2 Settings2 TLV320AIC3107EVM Jumpers and Switches List of Stand-alone JumpersPower Connections TLV320AIC3107EVM-K Setup and Installation Software InstallationEVM Connections Quick Start USB-MODEM Configurations TLV320AIC3107EVM SoftwareQuick Start Tabs Quick Start Preset Configurations Quick Start Preset Configurations TabMain Software Screen With Indicators and Functions Main Software ScreenDetailed TLV320AIC3107 Block Diagram Audio Input/ADC Tab Audio Input/ADC TabBypass Paths Tab Bypass Paths TabAudio Interface Tab Audio Interface TabConfiguring the Codec Clocks and Fsref Calculation Clocks TabSetting ADC and DAC Sampling Rates Use Without PLLUse With PLL GPIO1 Tab GPIO1 TabAGC Tab AGC TabLeft AGC Settings Filters Tab Filters TabADC Filters High-Pass FilterDigital Effects Filter ADC DAC Filters De-emphasis FiltersDAC Digital Effects Filter Digital Effects Filters Shelf FiltersEQ Filters Analog Simulation FiltersPreset Filters User Filters10 DAC/Line Outputs Tab 3.6 3D EffectDAC Controls Line Output MixersHP Output Stage Configuration Tab Output Stage Configuration TabHigh Power Outputs Tab HP Outputs TabClass-D Output Tab Class-D Output TabCommand Line Interface Tab Command Line Interface TabFile Menu Appendix a EVM Connector Descriptions Analog Interface ConnectorsAnalog Input/Output Connectors Table A-1. Analog Input/Output ConnectorsBlock a and Block B Digital Interface Connectors J16 and J17 Table A-2. Block a and Block B Digital Interface PinoutPower Supply Connector Pin Header, J15 Table A-3. Power Supply PinoutAppendix B TLV320AIC3107EVM Schematic TP4 Avdd DACAppendix B Figure C-1. Assembly layer Appendix C TLV320AIC3107EVM Layout ViewsFigure C-3. Layer Figure C-5. Bottom Layer Appendix D TLV320AIC3107EVM Bill of Materials Table D-1. TLV320AIC3107EVM Bill of MaterialsNot Appendix E USB-MODEVM Schematic Ti a HIGH-PERFORMANCE Analog Division Appendix F USB-MODEVM Bill of Materials Table F-1. USB-MODEVM Bill of MaterialsDesignators Description Manufacturer Table G-2. Data Packet Configuration Appendix G USB-MODEVM ProtocolUSB-MODEVM Protocol Table G-1. USB Control Endpoint Hidsetreport Request0x12 0xA0 0x02 0x05 0xAA 0x55 0x01 0xA0 0x02 0x05 Gpio Capability Table G-3. Gpio Pin AssignmentsWriting Scripts Writing Scripts Evaluation BOARD/KIT Important Notice FCC WarningImportant Notice
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