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WM8987LGECO/V Datasheet(PDF) 31 Page - Wolfson Microelectronics plc

Part # WM8987LGECO/V
Description  Stereo CODEC for Portable Audio Applications
PDF  58 Pages
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Manufacturer  WOLFSON [Wolfson Microelectronics plc]
Direct Link  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8987LGECO/V Datasheet(HTML) 31 Page - Wolfson Microelectronics plc

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Pre-Production
WM8987L
w
PP Rev 3.0 January 2007
31
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
8
LD2RO
0
Left DAC to Right Mixer
0 = Disable (Mute)
1 = Enable Path
7
LI2RO
0
LMIXSEL Signal to Right Mixer
0 = Disable (Mute)
1 = Enable Path
R36 (24h)
Right Mixer
Control (1)
6:4
LI2ROVOL
[2:0]
101
(-9dB)
LMIXSEL Signal to Right Mixer Volume
000 = +6dB
… (3dB steps)
111 = -15dB
8
RD2RO
0
Right DAC to Right Mixer
0 = Disable (Mute)
1 = Enable Path
7
RI2RO
0
RMIXSEL Signal to Right Mixer
0 = Disable (Mute)
1 = Enable Path
R37 (25h)
Right Mixer
Control (2)
6:4
RI2ROVOL
[2:0]
101
(-9dB)
RMIXSEL Signal to Right Mixer Volume
000 = +6dB
… (3dB steps)
111 = -15dB
Table 23 Right Output Mixer Control
The mono mixer differs from the left and right mixers in that the signal from each DAC into the mono
mixer is attenuated by 6dB. This is to prevent overloading when left and right DAC signals are mixed
to mono. When driving a BTL headset as shown in Figure 46, MONOVOL should be set 6dB higher
than the other output gains, in order to compensate for the 6dB attenuation at the mono mixer.
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
8
LD2MO
0
Left DAC to Mono Mixer
0 = Disable (Mute)
1 = Enable Path (-6dB gain)
7
LI2MO
0
LMIXSEL Signal to Mono Mixer
0 = Disable (Mute)
1 = Enable Path
R38 (26h)
Mono Mixer
Control (1)
6:4
LI2MOVOL
[2:0]
101
(-9dB)
LMIXSEL Signal to Mono Mixer
Volume
000 = +6dB
… (3dB steps)
111 = -15dB
8
RD2MO
0
Right DAC to Mono Mixer
0 = Disable (Mute)
1 = Enable Path
7
RI2MO
0
RMIXSEL Signal to Mono Mixer
0 = Disable (Mute)
1 = Enable Path
R39 (27h)
Mono Mixer
Control (2)
6:4
RI2MOVOL
[2:0]
101
(-9dB)
RMIXSEL Signal to Mono Mixer
Volume
000 = +6dB
… (3dB steps)
111 = -15dB
Table 24 Mono Mixer Control



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