WM8912 datasheet(63/129 Pages) CIRRUS

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Production Data

WM8912

PD, Rev 4.1, February 2013

DIGITAL PULL-UP AND PULL-DOWN

The WM8912 provides integrated pull-up and pull-down resistors on each of the MCLK, DACDAT,

LRCLK and BCLK pins. This provides a flexible capability for interfacing with other devices. Each of

the pull-up and pull-down resistors can be configured independently using the register bits described

in Table 38.

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

R126 (7Eh)

Digital Pulls

MCLK_PU

MCLK pull-up resistor enable

0 = pull-up disabled

1 = pull-up enabled

MCLK_PD

MCLK pull-down resistor enable

0 = pull-down disabled

1 = pull-down enabled

DACDAT_PU

DACDAT pull-up resistor enable

0 = pull-up disabled

1 = pull-up enabled

DACDAT_PD

DACDAT pull-down resistor enable

0 = pull-down disabled

1 = pull-down enabled

LRCLK_PU

LRCLK pull-up resistor enable

0 = pull-up disabled

1 = pull-up enabled

LRCLK_PD

LRCLK pull-down resistor enable

0 = pull-down disabled

1 = pull-down enabled

BCLK_PU

BCLK pull-up resistor enable

0 = pull-up disabled

1 = pull-up enabled

BCLK_PD

BCLK pull-down resistor enable

0 = pull-down disabled

1 = pull-down enabled

Table 38 Digital Audio Interface Pull-Up and Pull-Down Control

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