wm9081 Wolfson Microelectronics plc, wm9081 Datasheet - Page 19

• 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

Pre-Production
CONTROL INTERFACE (SOFTWARE MODE)
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The WM9081 can be controlled in hardware mode or in software modes. In hardware mode, the
device is configured according to logic levels applied to hardware pins. In software mode, the device
is configured using control register writes via a serial control interface. See “Control Interface
(Hardware Mode)” for details of hardware control mode.
Software Control Mode is selected by logic 1 on the SWMODE pin. The logic level is referenced to
the DBVDD power domain. When Software Mode is selected, the associated multi-function control
pins are defined as described in Table 1.
Table 1 Software Control Pin Configuration
A typical system configuration for software control mode is illustrated in Figure 10.
Figure 10 Software Control Mode Example – 2-Wire Control, Slave Mode, Device ID = D8h
SCIM/CHANNEL
SDIN/ENA
SCLK
SDOUT/ADDR0
CS
¯ ¯ /ADDR1/4FS
PROCESSOR
2-Wire Control
Digital Audio
Interface
Interface
PIN
SCIM/CHANNEL
___
CS/ADDR1/4FS
SDOUT/ADDR0
Software Control Interface Mode
0 = 2-wire
1 = 3-/4-wire
Serial Data Input
Serial Data Clock
2 wire mode - Device Address[0]
3-wire mode - Not used
4-wire mode - Serial Data Output
2 wire mode - Device Address[1]
3-/4-wire mode - Chip Select
SDIN/ENA
SWMODE
DACDAT
LRCLK
MCLK
SCLK
BCLK
IRQ
___
IN1
IN2
DESCRIPTION
INTERFACE
CONTROL
FLL
PP, Rev 3.0, April 2009
W
0dB / -6dB
0dB / -6dB
WM9081
DIGITAL AUDIO
INTERFACE
CONTROL
WM9081
CLOCK
DBVDD
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