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WM8983 Datasheet(PDF) 74 Page - Wolfson Microelectronics plc

Part # WM8983
Description  Mobile Multimedia CODEC with 1W Speaker Driver
PDF  124 Pages
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Manufacturer  WOLFSON [Wolfson Microelectronics plc]
Direct Link  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8983 Datasheet(HTML) 74 Page - Wolfson Microelectronics plc

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WM8983
Production Data
w
PD, Rev 4.3, May 2010
74
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
R56
OUT3 mixer
control
6
OUT3MUTE
0
0 = Output stage outputs OUT3 mixer
1 = Output stage muted – drives out
VMID. Can be used as VMID reference
in this mode.
3
OUT4_2OUT3
0
OUT4 mixer output to OUT3
0 = disabled
1 = enabled
2
BYPL2OUT3
0
Left ADC input to OUT3
0 = disabled
1 = enabled
1
LMIX2OUT3
0
Left DAC mixer to OUT3
0 = disabled
1= enabled
0
LDAC2OUT3
1
Left DAC output to OUT3
0 = disabled
1 = enabled
R57
OUT4 mixer
control
7
OUT3_2OUT4
0
OUT3 mixer output to OUT4
0 = disabled
1= enabled
6
OUT4MUTE
0
0 = Output stage outputs OUT4 mixer
1 = Output stage muted – drives out
VMID. Can be used as VMID reference
in this mode.
5
OUT4ATTN
0
0 = OUT4 normal output
1 = OUT4 attenuated by 6dB
4
LMIX2OUT4
0
Left DAC mixer to OUT4
0 = disabled
1 = enabled
3
LDAC2OUT4
0
Left DAC to OUT4
0 = disabled
1 = enabled
2
BYPR2OUT4
0
Right ADC input to OUT4
0 = disabled
1 = enabled
1
RMIX2OUT4
0
Right DAC mixer to OUT4
0 = disabled
1 = enabled
0
RDAC2OUT4
1
Right DAC output to OUT4
0 = disabled
1 = enabled
Table 47 OUT3/OUT4 Mixer Registers
The OUT3 and OUT4 output stages each have a selectable gain boost of 1.5x (3.52dB). When this
boost is enabled the output DC level is also level shifted (from AVDD1/2 to 1.5xAVDD1/2) to prevent
the signal from clipping. A dedicated amplifier BUFDCOP, as shown in Figure 39, is used to perform
the DC level shift operation. This buffer must be enabled using the BUFDCOPEN register bit for this
operating mode. It should also be noted that if AVDD2 is not equal to or greater than 1.5xAVDD1 this
boost mode may result in signals clipping. Table 44 summarises the effect of the OUT3BOOST and
OUT4BOOST control bits.



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