wm9081 Wolfson Microelectronics plc, wm9081 Datasheet - Page 25

• 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 (HARDWARE 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
(Software Mode)” for details of software control mode.
Hardware Control Mode selected by logic 0 on the SWMODE pin. The logic level is referenced to the
DBVDD power domain. When Hardware Mode is selected, the associated multi-function control pins
are defined as described in Table 7.
Note that two variants of Hardware Control Mode are supported; these are selected according to the
logic level on the CS
clocked via a 12.288MHz input to the MCLK pin. In 4FS mode, the WM9081 is clocked via the BCLK
pin. The selected channel of the received audio signal is routed to the Class D speaker output.
Table 6 Hardware Control Pin Configuration
A typical system configuration using hardware (normal) control is illustrated in Figure 20.
Figure 20 Hardware Control Mode Example – Normal Mode, Left Channel
A typical system configuration using 4FS mode is illustrated in Figure 21.
SCIM/CHANNEL
SDIN/ENA
SCLK
SDOUT/ADDR0
CS
¯ ¯ /ADDR1/4FS
PROCESSOR
Digital Audio
Interface
GPIO
PIN
¯ ¯ /ADDR1/4FS pin, as described in Table 7. In Normal mode, the WM9081 is
SCIM/CHANNEL
___
CS/ADDR1/4FS
SDOUT/ADDR0
Left/Right Channel select
0 = Left channel
1 = Right channel
Device Enable (Normal mode)
0 = Disabled
1 = Enabled
Not used
Not used
4FS Mode select
0 = Normal
1 = 4FS Mode enabled
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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