WM8746 Wolfson Microelectronics plc, WM8746 Datasheet - Page 22

• Manufacturer Part Number: WM8746
• Description: 24-bit, 192khz 6-channel Dac With Volume Control
• Manufacturer: Wolfson Microelectronics plc

WM8746
SOFTWARE CONTROL INTERFACE
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The software control interface uses a 3-wire serial control interface. Selection of interface format is
achieved by setting the state of the MODE pin.
Table 11 Control Interface Mode Selection
3-WIRE (SPI COMPATIBLE) SERIAL CONTROL MODE
The WM8746 can be controlled using a 3-wire serial interface. MD/DM is used for the program data,
MC/IWL is used to clock in the program data and ML/I2S is use to latch in the program data. The 3-
wire interface protocol is shown in Figure 13.
Figure 13 3-wire Serial Interface
Notes:
1.
2.
A[6:0] are Control Address Bits
D[8:0] are Control Data Bits
MC/IWL
MD/DM
ML/I2S
MODE
0
1
A6
A5
A4
A3
A2
A1
Hardware Control Mode
Software Control Mode
INTERFACE FORMAT
A0
D8
D7
D6
D5
D4
D3
PD, October 2008, Rev 4.2
D2
D1
Production Data
D0
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