Texas Instruments SLEU056 manual Description of Switches and Buttons

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Description of Switches and Buttons

2.5 Description of Switches and Buttons

2.5.1S/PDIF Input Selector Switch (S100)

S100 switches between optical and coaxial S/PDIF input. When the lever is pressed in the direction of J101, the optical S/PDIF input is selected. When the lever is pressed in the direction of J100, the coaxial S/PDIF input is selected.

2.5.2Bypass Digital Audio Processor Switch (S320)

When the lever is pressed in the direction of S341, the DAP is bypassed. When the lever is pressed in the direction of U360 (TAS3002), the DAP is in the signal path. Below S320 is a label (DAP ON), which indicates the position of the lever for the DAP inserted in signal path.

Warning

Bypassing the DAP is equal to maximum output power (attenuation = 0 dB). This might be loud and could possible damage your loudspeaker and hearing.

2.5.3Reset Board Button (S620)

This is the master RESET for the EVM board. While this button is held down, the DIR1703, TAS3002, TAS5010, and TAS5112ADFD are held RESET and latching errors are cleared. Note that while the RESET button is held down, the No S/PDIF LED lights up, even if a valid S/PDIF input signal is present, because the DIR1703 S/PDIF receiver is held RESET.

2.5.4Mute Button (S240)

The output stage is muted (not switching) while this button is held down and unmutes when it is released.

2.5.5Volume Control (S340 and S341)

S341 and S340: Volume control of TAS3002 DAP. Press and hold the S341 button to decrease output power level. Press and hold the S340 button to increase output power level.

Note:

Change of listening level is slow. It takes approximately 25 seconds to change attenuation from –70 dB to 0 dB.

The TAS3002 device implements a soft volume control. This feature allows a change from one volume level to another over the entire range of volume control (+18 dB to mute). Above 0 dB, there is risk of signal clipping. Distortion of output signals is the result of signal clipping.

Note:

Significant signal clipping might result in activation of the overcurrent protection system.

Detailed Description of the EVM

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Contents User’s Guide Products Applications Important NoticeEVM Important Notice EVM Warnings and Restrictions About This Manual Read This FirstPart Number Literature Number Related Documentation From Texas InstrumentsContents Tables FiguresIntroduction TAS5010−5112F2EVM FeaturesTopic −1. Simplified TAS5010−5112F2EVM Block Diagram TAS5010−5112F2EVM FeaturesTAS5010−5112F2EVM Features Page Topic Detailed Description of the EVMMute Board OverviewEnable/Disable S/PDIF−MUTE JMP130 Description of Jumper SettingsDouble-Speed Control JMP120 2 S/PDIF Optical J101 Default Jumper PositioinsDescription of Connectors 1 S/PDIF Digital Audio Coaxial/RCA Input J100PC and I2C Interface J300 Pin No Description Analog Input Connector J160Analog Output Connector J170 Pin No Pin Description Net Name on SchematicReference Designator Description Loudspeaker Connectors J540, J541, J580, and J581Power Supply Connector Pin No Description Net Name at SchematicDescription of Switches and Buttons Protection Mode LED LED220 Description of IndicatorsPower LED LED223 Temperature Warning LED LED221EVM Board Operation Load = 6 Ω Power SupplyPower the EVM by One Power Supply Power the EVM With Two Power SuppliesEqualizer Enable Setup the TAS5010−5112F2EVM With the S/PDIF InputStart-up Sequence Setup the TAS5010−5112F2EVM With the Analog Line InputInterfacing the Analog Line Output Controlling the DAP With PC SoftwareHints for Measurement of Performance
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