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WM8721 Arkusz danych(PDF) 28 Page - Wolfson Microelectronics plc

Numer części WM8721
Szczegółowy opis  Internet Audio DAC with Integrated Headphone Driver
PDF  37 Pages
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Producent  WOLFSON [Wolfson Microelectronics plc]
Strona internetowa  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8721 Arkusz danych(HTML) 28 Page - Wolfson Microelectronics plc

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WM8721 / WM8721L
Production Data
w
PD Rev 4.0 November 2004
28
REGISTER MAP
The complete register map is shown in Table 21. The detailed description can be found in the
relevant text of the device description. There are 9 registers with 9 bits per register. These can be
controlled using either the 2 wire or 3 wire MPU interface.
REGISTER
B
15
B
14
B
13
B
12
B
11
B
10
B
9
B8
B7
B6
B5
B4
B3
B2
B1
B0
R2 (04h)
0
0
0
0
0
1
0
LRHP
BOTH
LZCEN
LHPVOL
R3 (06h)
0
0
0
0
0
1
1
RLHP
BOTH
RZCEN
RHPVOL
R4 (08h)
0
0
0
0
1
0
0
0
0
0
0
DAC SEL
0
0
0
0
R5 (0Ah)
0
0
0
0
1
0
1
0
0
0
0
0
DAC MU
DEEMPH
0
R6 (0Ch)
0
0
0
0
1
1
0
0
POWER
OFF
1
1
OUTPD
DACPD
1
1
1
R7 (0Eh)
0
0
0
0
1
1
1
0
BCLK
INV
MS
LR SWAP
LRP
IWL
FORMAT
R8 (10h)
0
0
0
1
0
0
0
0
0
CLKI
DIV2
SR
BOSR
USB/ NORM
R9 (12h)
0
0
0
1
0
0
1
0
0
0
0
0
0
0
0
ACTIVE
R15(1Eh)
0
0
0
1
1
1
1
RESET
ADDRESS
DATA
Table 19 Mapping of Program Registers
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
0
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[6:0] and LZCEN to
RHPVOL[6:0] and RZCEN
0 = Disable Simultaneous Load



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