wm8982gefl-v Wolfson Microelectronics plc, wm8982gefl-v Datasheet - Page 48

• Manufacturer Part Number: wm8982gefl-v
• Description: Mono Codec With Speaker Driver And Video Buffer
• Manufacturer: Wolfson Microelectronics plc

WM8982
ANALOGUE OUTPUTS
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Table 34 EQ Band 4 Control
Table 35 EQ Band 5 Control
Table 36 Gain Register Table
The WM8982 has three analogue outputs. These are:
•
•
SPKOUTP/N and MONOOUT are supplied from SPKVDD and are capable of driving up to 1.5Vrms
signals as shown in Figure 26.
SPKOUTP and SPKOUTN have individual analogue volume PGAs with -57dB to +6dB ranges.
There are three output mixers in the output signal path, the two SPKOUTN/P mixers which control
the signals to speaker, and also a dedicated MONOOUT mixer.
SPEAKER OUTPUT CHANNEL MIXERS
The speaker output channel mixers are shown in Figure 26. These mixers allow the AUX inputs, the
ADC bypass and the DAC channels to be combined as desired.
channel with external line-in from the AUX or speech from the input bypass path.
R21
EQ Band 4
Control
R22
EQ Band 5
Gain Control
REGISTER
REGISTER
ADDRESS
ADDRESS
SPKOUTP and SPKOUTN – normally used to drive an 8Ω BTL speaker.
MONOOUT – line output.
GAIN REGISTER
11001 to 11111
…. (1dB steps)
00000
00001
00010
01100
01101
11000
4:0
6:5
8
4:0
6:5
BIT
BIT
EQ4G
EQ4C
EQ4BW
EQ5G
EQ5C
LABEL
LABEL
Reserved
01100
(0dB)
01
0
01100
(0dB)
01
+12dB
+11dB
+10dB
-12dB
GAIN
-1dB
DEFAULT
DEFAULT
0dB
Band 4 Gain Control. See Table 36 for
details
Band 4 Centre Frequency:
00=1.8kHz
01=2.4kHz
10=3.2kHz
11=4.1kHz
Band 4 Bandwidth Control
0=narrow bandwidth
1=wide bandwidth
Band 5 Gain Control. See Table 36 for
details.
Band 5 Cut-off Frequency:
00=5.3kHz
01=6.9kHz
10=9kHz
11=11.7kHz
This allows a mix of the DAC
PP, Rev 3.2, September 2008
DESCRIPTION
DESCRIPTION
Pre-Production
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