WM8978 Wolfson Microelectronics Ltd., WM8978 Datasheet - Page 48

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WM8978

Manufacturer Part Number
WM8978
Description
The WM8978 is a low power, high quality stereo codec designed for portable applications such as Digital still camera or Digital Camcorde
Manufacturer
Wolfson Microelectronics Ltd.
Datasheet

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WM8978
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Table 29 EQ Band 3 Control
Table 30 EQ Band 4 Control
Table 31 EQ Band 5 Control
Table 32 Gain Register Table
R20
EQ Band 3
Control
R21
EQ Band 4
Control
R22
EQ Band 5
Gain Control
REGISTER
REGISTER
REGISTER
ADDRESS
ADDRESS
ADDRESS
GAIN REGISTER
11001 to 11111
…. (1dB steps)
00000
00001
00010
01100
01101
11000
4:0
6:5
8
4:0
6:5
8
4:0
6:5
BIT
BIT
BIT
EQ3G
EQ3C
EQ3BW
EQ4G
EQ4C
EQ4BW
EQ5G
EQ5C
LABEL
LABEL
LABEL
Reserved
01100
(0dB)
01
0
01100
(0dB)
01
0
01100
(0dB)
01
+12dB
+11dB
+10dB
-12dB
GAIN
-1dB
DEFAULT
DEFAULT
DEFAULT
0dB
Band 3 Gain Control. See Table 32 for
details.
Band 3 Centre Frequency:
00=650Hz
01=850Hz
10=1.1kHz
11=1.4kHz
Band 3 Bandwidth Control
0=narrow bandwidth
1=wide bandwidth
Band 4 Gain Control. See Table 32 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 32 for
details.
Band 5 Cut-off Frequency:
00=5.3kHz
01=6.9kHz
10=9kHz
11=11.7kHz
PTD Rev 2.6 November 2005
DESCRIPTION
DESCRIPTION
DESCRIPTION
Preliminary Technical Data
48