Production Data
WM8741
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.
PIN
NAME
MODE/
LRSEL
DESCRIPTION
24
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.
PIN
NAME
SCLK/DSD 0 = PCM Mode
1 = DSD Direct Mode
DESCRIPTION
27
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
NAME
28
23
DESCRIPTION
16-bit right justified
24-bit right justified
24-bit left justified
24-bit I2S
CSB/SADDR/I2S
IWO/DOUT
STATUS
0
0
1
1
0
1
0
1
Table 46 CSB/SADDR/I2S and IWO/DOUT Hardware Control Pin Function
PD, Rev 4.2, October 2009
39
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WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
