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WM8980CGEFL/V Datasheet(PDF) 69 Page - Wolfson Microelectronics plc

No. de pieza WM8980CGEFL/V
Descripción Electrónicos  Stereo CODEC with Speaker Driver and Video Buffer
PDF  123 Pages
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Fabricante Electrónico  WOLFSON [Wolfson Microelectronics plc]
Página de inicio  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8980CGEFL/V Datasheet(HTML) 69 Page - Wolfson Microelectronics plc

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Pre-Production
WM8980
w
PP, Rev 3.8, May 2012
69
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
R49
0
VROI
0
VREF (AVDD/2 or 1.5xAVDD/2) to
analogue output resistance
0: approx 1k
1: approx 30 k
Table 52 Disabled Outputs to VREF Resistance
A dedicated buffer is available for tying off unused analogue I/O pins as shown in Figure 35. 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 35 summarises the tie-off options for the speaker and mono output pins.
Figure 35 Unused Input/Output Pin Tie-off Buffers



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