wm9081 Wolfson Microelectronics plc, wm9081 Datasheet - Page 27

• 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
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6.144MHz. The integrated Frequency Locked Loop (FLL) is used to generate all the necessary
internal clocks to operate the device from the BCLK input only.
In 4FS mode, the SDIN/ENA pin is not used as the Device Enable input. Instead, the WM9081
monitors the BCLK input and automatically powers up when BCLK is present and shuts down when
BCLK is not present. This enables the WM9081 to operate autonomously with the minimum number
of control signals.
HARDWARE CONTROL MODES SUMMARY
The WM9081 Hardware Control Modes are summarised in Table 7.
See “Digital Audio Interface” for more details of the I
Table 7 Hardware Control Modes Summary
Notes
1.
Audio interface data format
Word length
Data channel select
Master/Slave mode
TDM enabled
Clock input source
BCLK frequency
Automatic power-up / shut-down
MCLK must continue to run for 50ms after SDA/ENA is asserted low in order to
shutdown the device.
CONFIGURATION
Selected by SCIM/CHANNEL
NORMAL MODE
>= 32 x LRCLK
Stereo I
MCLK
Slave
Yes
No
16
2
S audio interface protocol.
2
S
Selected by SCIM/CHANNEL
PP, Rev 3.0, April 2009
32 x LRCLK
4FS MODE
Stereo I
BCLK
Slave
Yes
No
16
WM9081
2
S
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