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WM8721 Datasheet(PDF) 14 Page - Wolfson Microelectronics plc

Part # WM8721
Description  Internet Audio DAC with Integrated Headphone Driver
PDF  34 Pages
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Manufacturer  WOLFSON [Wolfson Microelectronics plc]
Direct Link  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8721 Datasheet(HTML) 14 Page - Wolfson Microelectronics plc

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WM8721
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WOLFSON MICROELECTRONICS LTD
PP Rev 1.3 November 2000
14
The software control is given in Table 4.
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
6:0
LHPVOL[6:0]
1111001
( 0dB )
Left Channel Headphone Output
Volume Control
1111111 = +6dB
. . 1dB steps down to
0110000 = -73dB
0000000 to 0101111 = MUTE
7
LZCEN
1
Left Channel Zero Cross detect
Enable
1 = Enable
0 = Disable
0000010
Left
Headphone
Out
8
LRHPBOTH
0
Left to Right Channel Headphone
Volume, Mute and Zero Cross Data
Load Control
1 = Enable Simultaneous Load of
LHPVOL[7:0] and LZCEN to
RHPVOL[7:0] and RZCEN
0 = Disable Simultaneous Load
6:0
RHPVOL[7:0]
1111001
( 0dB )
Right Channel Headphone Output
Volume Control
1111111 = +6dB
. . 1dB steps down to
0110000 = -73dB
0000000 to 0101111 = MUTE
7
RZCEN
1
Right Channel Zero Cross Detect
Enable
1 = Enable
0 = Disable
0000011
Right
Headphone
Out
8
RLHPBOTH
0
Right to Left Channel Headphone
Volume, Mute and Zero Cross Data
Load Control
1 = Enable Simultaneous Load of
RHPVOL[7:0] and RZCEN to
LHPVOL[7:0] and LZCEN
0 = Disable Simultaneous Load
Table 4 Headphone Output Software Control
The recommended external components required to complete the application are shown in Figure 11.
AGND
R1
C1
AGND
HPOUT
Figure 11 Headphone Output Application Drawing



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