WM8768EDSSLASHR datasheet(26/38 Pages) WOLFSON

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WM8768

Production Data

PD Rev 4.1 March 2005

MUTE PIN AS INPUT

The WM8768 can be muted externally by driving the MUTE pin high. When the MUTE pin is driven

low the device will never automute, although direct mutes can still be applied via the DMUTE or

MUTEALL registers.

The DZFM bits are used to decode the operation of a MUTE pin (decides which channels will be

affected by the logic level present on the MUTE pin). MPD (Mute Pin Decode) is used to enable the

DZFM operation. If MPD is set, the selection made by the DZFM bits will be ignored and all channels

will be muted when the pin is driven high.

Table 11 below describes which channels will be softmuted when the MUTE pin is driven high

depending on the MPD and DZFM bits.

MPD

{DZFM4,DZFM [1:0]}

CHANNELS MUTED WHEN

MUTE PIN HIGH

000

All Channels

001

CH1

010

CH2

011

CH3

100

CH4

101

CH1 and CH2

110

CH1, CH2 and CH3

111

CH3 and CH4

000

All Channels

001

All Channels

010

All Channels

011

All Channels

100

All Channels

101

All Channels

110

All Channels

111

All Channels

Table 11 Mute Pin Decode when Mute Pin as Input

WM8768EDS/R Datasheet(PDF) 26 Page - Wolfson Microelectronics plc

WM8768EDS/R Datasheet(HTML) 26 Page - Wolfson Microelectronics plc

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