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WM9713 Datasheet(PDF) 104 Page - Wolfson Microelectronics plc

Part # WM9713
Description  AC 97 AUDIO TOUCHPANEL CODEC
PDF  111 Pages
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Manufacturer  WOLFSON [Wolfson Microelectronics plc]
Direct Link  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM9713 Datasheet(HTML) 104 Page - Wolfson Microelectronics plc

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WM9713L
Preliminary Technical Data
1
PTD, March 2004, Rev 2.2
104
BTL LOUDSPEAKER OUTPUT
SPKL and SPKR can differentially drive a mono 8
Ω loudspeaker as shown below.
Figure 37 Speaker Output Connection (INV = 1)
To drive out differentially one of the speaker outputs must be inverted using INV1 or INV2.
COMBINED HEADSET / BTL EAR SPEAKER
In smartphone applications with a loudspeaker and separate ear speaker (receiver), a BTL ear
speaker can be connected at the OUT3 pin, as shown below.
Figure 38 Combined Headset / BTL Ear Speaker
The ear speaker and the headset play the same signal. Whenever the headset is plugged in, the
headphone outputs are enabled and OUT3 disabled. When the headset is not plugged in, OUT3 is
enabled (see “Jack Insertion and Auto-Switching”)



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