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WM8976CGEFL/V Datasheet(PDF) 65 Page - Wolfson Microelectronics plc

No. de pieza WM8976CGEFL/V
Descripción Electrónicos  Stereo CODEC with Speaker Driver
PDF  114 Pages
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Fabricante Electrónico  WOLFSON [Wolfson Microelectronics plc]
Página de inicio  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8976CGEFL/V Datasheet(HTML) 65 Page - Wolfson Microelectronics plc

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Production Data
WM8976
w
PD, Rev 4.5, November 2011
65
A dedicated buffer is available for tying off unused analogue I/O pins as shown in Figure 34. This
buffer can be enabled using the BUFIOEN register bit.
If the SPKBOOST, OUT3BOOST or OUT4BOOST bits are set then the relevant outputs will be tied to
the output of the DC level shift buffer at 1.5xAVDD/2 when disabled.
Figure 34 summarises the tie-off options for the speaker and mono output pins.
Figure 34 Unused Input/Output Pin Tie-off Buffers
L/ROUT2EN/
OUT3/4EN
OUT3BOOST/
OUT4BOOST/
SPKBOOST
VROI
OUTPUT CONFIGURATION
0
0
0
1kΩ tie-off to AVDD/2
0
0
1
30kΩ tie-off to AVDD/2
0
1
0
1kΩ tie-off to 1.5xAVDD/2
0
1
1
30kΩ tie-off to 1.5xAVDD/2
1
0
X
Output enabled (DC level=AVDD/2)
1
1
X
Output enabled (DC level=1.5xAVDD/2)
Table 53 Unused Output Pin Tie-off Options



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