WM8976 datasheet(62/108 Pages) WOLFSON

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WM8976 데이터시트(PDF) 62 Page - Wolfson Microelectronics plc

부품명	WM8976

상세설명	Stereo CODEC With Speaker Driver

PDF	108 Pages

Scroll/Zoom	100%

제조업체	WOLFSON [Wolfson Microelectronics plc]

홈페이지	http://www.wolfsonmicro.com

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62 / 108 page

WM8976

Pre-Production

PP Rev 3.0 April 2006

A dedicated buffer is available for tying off unused analogue I/O pins as shown in Figure 27. 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 27 summarises the tie-off options for the speaker and mono output pins.

Figure 27 Unused Input/Output Pin Tie-off Buffers

L/ROUT2EN/

OUT3/4EN

OUT3BOOST/

OUT4BOOST/

SPKBOOST

VROI

OUTPUT CONFIGURATION

1kΩ tie-off to AVDD/2

30kΩ tie-off to AVDD/2

1kΩ tie-off to 1.5xAVDD/2

30kΩ tie-off to 1.5xAVDD/2

Output enabled (DC level=AVDD/2)

Output enabled (DC level=1.5xAVDD/2)

Table 52 Unused Output Pin Tie-off Options

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