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LM4549 Datasheet(PDF) 7 Page - National Semiconductor (TI) |
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LM4549 Datasheet(HTML) 7 Page - National Semiconductor (TI) |
7 / 18 page Connection Diagram Pin Description Analog I/O Name Pin I / O Functional Description PC_BEEP 12 I This is a mono input which gets summed into both the stereo line out and the true line level out after the National 3D Sound block. The PC_BEEP level can be adjusted from 0dB to −45dB in 3dB steps, or muted, via register 0Ah. This input is directly connected to the line output while the reset pin is held active low to allow power on self test tones to be heard through the audio system. PHONE 13 I This is a mono input which gets summed into both the stereo line out and the true line level out after the National 3D Sound block. The PHONE level can be adjusted from +12dB to −34.5dB in 1.5dB steps as well as muted via register 0Ch. AUX_L 14 I This line level input can be routed through the Input Mux and recorded by the left ADC. In addition, this analog input gets summed into the left output stream. The amount of AUX_L signal mixed in the left output stream can be adjusted from +12dB to −34.5dB in 1.5dB steps as well as muted via register 16h. DS101035-2 Top View Order Number LM4549VH See NS Package Number VBH48A www.national.com 7 |
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