WM8711 Wolfson Microelectronics Ltd., WM8711 Datasheet - Page 28

• Manufacturer Part Number: WM8711
• Description: Internet Audio DAC With Integrated Headphone Driver
• Manufacturer: Wolfson Microelectronics Ltd.

WM8711
REGISTER MAP
WOLFSON MICROELECTRONICS LTD
In STANDBY mode the Control Interface, a small portion of the digital and areas of the analogue
circuitry remain active. The active analogue includes the analogue VMID reference so that the
analogue line outputs and headphone outputs remain biased to VMID. This reduces any audible
effects caused by DC glitches when entering or leaving STANDBY mode.
The device can be powered off by writing to the POWEROFF bit of the Power Down register. In
POWEROFF mode the Control Interface and a small portion of the digital remain active. The
analogue VMID reference is disabled. Refer to Table 21.
Table 21 Poweroff Mode
The complete register map is shown in Table 22. The detailed description can be found in the
relevant text of the device description. There are 8 registers with 9 bits per register. These can be
controlled using either the 2 wire or 3 wire MPU interface.
0000010
Left Headphone
Out
1
1
1
REGISTER
ADDRESS
0
1
1
0
0
1
6:0
7
8
BIT
X
X
X
LHPVOL
[6:0]
LZCEN
LRHPBOTH
LABEL
1
1
1
1
1
X
1111001
( 0dB )
1
0
DEFAULT
DESCRIPTION
POWEROFF, but with Crystal Oscillator OS and
CLKOUT available
POWEROFF, but with Crystal Oscillator OS
available, CLKOUT not-available
POWEROFF, Crystal oscillator and CLKOUT
not-available.
Left Channel Headphone Output
Volume Control
1111111 = +6dB
. . 1dB steps down to
0110000 = -73dB
0000000 to 0101111 = MUTE
Left Channel Zero Cross detect
Enable
1 = Enable
0 = Disable
Left to Right Channel Headphone
Volume, Mute and Zero Cross Data
Load Control
1 = Enable Simultaneous Load of
LHPVOL[6:0] and LZCEN to
RHPVOL[6:0] and RZCEN
0 = Disable Simultaneous Load
DESCRIPTION
PP Rev 1.2 November 2000
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