WM8758B Datasheet, PDF (48/90 Pages) Wolfson Microelectronics plc – Stereo CODEC with Headphone Driver and Line Out

WM8758B
Production Data
REGISTER
ADDRESS
R20
EQ Band 3
Control
BIT
LABEL
4:0 EQ3G
6:5 EQ3C
8
EQ3BW
Table 27 EQ Band 3 Control
DEFAULT
DESCRIPTION
01100
(0dB)
01
0
Band 3 Gain Control. See Table 30 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
REGISTER
ADDRESS
R21
EQ Band 4
Control
BIT
LABEL
4:0 EQ4G
6:5 EQ4C
8
EQ4BW
Table 28 EQ Band 4 Control
DEFAULT
DESCRIPTION
01100
(0dB)
01
0
Band 4 Gain Control. See Table 30 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
REGISTER
ADDRESS
R22
EQ Band 5
Gain Control
BIT
LABEL
4:0 EQ5G
6:5 EQ5C
Table 29 EQ Band 5 Control
DEFAULT
DESCRIPTION
01100
(0dB)
01
Band 5 Gain Control. See Table 30 for
details.
Band 5 Cut-off Frequency:
00 = 5.3kHz
01 = 6.9kHz
10 = 9kHz
11 = 11.7kHz
GAIN REGISTER
00000
00001
00010
…. (1dB steps)
01100
01101
11000 to 11111
Table 30 Gain Register Table
GAIN
+12dB
+11dB
+10dB
0dB
-1dB
-12dB
See also Figure 49 to Figure 66 for equaliser and high pass filter responses.
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PD, Rev 4.4, January 2012
48