lm4543 National Semiconductor Corporation, lm4543 Datasheet - Page 7

• Manufacturer Part Number: lm4543
• Description: Ac ?97 Codec With National 3d Sound
• Manufacturer: National Semiconductor Corporation

PC_BEEP
Connection Diagram
Pin Description
Analog I/O
PHONE
AUX_R
AUX_L
Name
Pin
12
13
14
15
I / O
I
I
I
I
Functional Description
This is a mono input which gets summed into the stereo line output 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 is a mono input which gets summed into the stereo line output 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.
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.
This line level input can be routed through the Input Mux and recorded by the right ADC. In
addition, this analog input gets summed into the right output stream. The amount of AUX_R
signal mixed in the right output stream can be adjusted from +12dB to −34.5dB in 1.5dB
steps as well as muted via register 16h.
See NS Package Number VBH48A
Order Number LM4543VH
Top View
7
DS100907-2
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