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WM8971LEFL/R Datasheet(PDF) 32 Page - Wolfson Microelectronics plc

Part # WM8971LEFL/R
Description  STEREO CODEC FOR PORTABLE AUDIO APPLLICATIONS
PDF  56 Pages
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Manufacturer  WOLFSON [Wolfson Microelectronics plc]
Direct Link  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8971LEFL/R Datasheet(HTML) 32 Page - Wolfson Microelectronics plc

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WM8971L
Advanced Information
w
AI Rev 3.0 March 2004
32
LOUT2/ROUT2 OUTPUTS
The LOUT2 and ROUT2 output pins are essentially similar to LOUT1 and ROUT1, but they are
independently controlled and can also drive an 8
Ω mono speaker (see Speaker Output section). For
speaker drive, the ROUT2 signal must be inverted (ROUT2INV = 1), so that the left and right channel
are mixed to mono in the speaker [L–(-R) = L+R].
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
6:0
LOUT2VOL
[6:0]
1111001
(0dB)
Similar to LOUT1VOL
7
LO2ZC
0
Left zero cross enable
1 = Change gain on zero cross only
0 = Change gain immediately
R40 (28h)
LOUT2
Volume
8
LO2VU
0
Same as LO1VU
6:0
ROUT2VOL
[6:0]
1111001
(0dB)
Similar ROUT1VOL
7
RO2ZC
0
Right zero cross enable
1 = Change gain on zero cross only
0 = Change gain immediately
R41 (29h)
ROUT2
Volume
8
RO2VU
0
Same as RO1VU
R24 (18h)
Additional
Control (2)
4
ROUT2INV
0
ROUT2 Invert
0 = No Inversion (0
° phase shift)
1 = Signal inverted (180
° phase shift)
Table 21 LOUT2/ROUT2 Volume Control
MONO OUTPUT
The MONOOUT pin can drive a mono line output. The signal volume on MONOOUT can be adjusted
under software control by writing to MONOOUTVOL.
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
6:0
MONOOUT
VOL [6:0]
1111001
(0dB)
MONOOUT Volume
1111111 = +6dB
… (80 steps)
0110000 = -67dB
0101111 to 0000000 = Analogue MUTE
R42 (2Ah)
MONOOUT
Volume
7
MOZC
0
MONOOUT zero cross enable
1 = Change gain on zero cross only
0 = Change gain immediately
Table 22 MONOOUT Volume Control



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