wm9081 Wolfson Microelectronics plc, wm9081 Datasheet - Page 24

• Manufacturer Part Number: wm9081
• Description: Mono Dac With 2.6w Class Ab/d Speaker Driver, Dynamic Range Controller And Retune Mobile Parametric Equalizer
• Manufacturer: Wolfson Microelectronics plc

WM9081
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4-WIRE CONTROL MODE
In Write operations, this mode is the same as 3-wire Control Mode.
In Read operations, the SDIN pin is ignored following receipt of the valid register address. The data
bits are output by the WM9081 on the SDOUT pin.
The SDOUT pin can be configured as CMOS or Open Drain, as described in Table 2. In CMOS
mode, SDOUT is driven low when not outputting register data bits. In Open Drain mode, SDOUT is
undriven when not outputting register data bits.
The 4-wire control mode timing is illustrated in Figure 19.
Figure 19 4-Wire Serial Control Interface
PP, Rev 3.0, April 2009
Pre-Production
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