wm8742 Wolfson Microelectronics plc, wm8742 Datasheet - Page 39

• Manufacturer Part Number: wm8742
• Description: 24-bit 192khz Dac With Advanced Digital Filtering
• Manufacturer: Wolfson Microelectronics plc

Production Data
HARDWARE CONTROL MODE
w
When the MODE pin is held ‘low’ the WM8742 is set to hardware control mode and a limited feature
set can be configured.
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.
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.
Table 46 CSB/SADDR/I2S and IWO/DOUT Hardware Control Pin Function
PIN NUMBER
STATUS
NAME
PIN
PIN
24
27
SCLK/DSD
MODE/
LRSEL
NAME
NAME
CSB/SADDR/I2S
28
0
0
1
1
0 = Hardware control mode
1 = 3-wire serial control mode
Z = 2-wire serial control mode
0 = PCM Mode
1 = DSD Direct Mode
DESCRIPTION
DESCRIPTION
IWO/DOUT
23
0
1
0
1
16-bit right justified
24-bit right justified
PD, Rev 4.2, August 2009
24-bit left justified
DESCRIPTION
24-bit I
2
S
WM8742
39