WM8741 datasheet(39/64 Pages) WOLFSON

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WM8741

PD, Rev 4.2, October 2009

HARDWARE CONTROL MODE

When the MODE pin is held ‘low’ the WM8741 is set to hardware control mode and a limited feature

set can be configured.

NAME

DESCRIPTION

MODE/

LRSEL

0 = Hardware control mode

1 = 3-wire serial control mode

Z = 2-wire serial control mode

Table 44 MODE/LRSEL Hardware Control Pin Function

DSD AND PCM MODE SWITCHING

The audio interface mode can be switched between DSD Direct and PCM by controlling the state of

pin DSD. It is recommended that the chip is forced into a MUTE state before dynamically switching

modes.

NAME

DESCRIPTION

SCLK/DSD

0 = PCM Mode

1 = DSD Direct Mode

Table 45 SCLK/DSD Hardware Control Pin Function

AUDIO INPUT FORMAT

Under hardware control, it is possible to select between four different modes of operation for the

PCM audio interface.

PIN NUMBER

DESCRIPTION

NAME

CSB/SADDR/I2S

IWO/DOUT

STATUS

16-bit right justified

24-bit right justified

24-bit left justified

24-bit I

Table 46 CSB/SADDR/I2S and IWO/DOUT Hardware Control Pin Function

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