WM8974GEFL/V Wolfson Microelectronics, WM8974GEFL/V Datasheet - Page 40

• Manufacturer Part Number: WM8974GEFL/V
• Description: Audio CODECs Mono Codec with Spkr
• Manufacturer: Wolfson Microelectronics

Specifications of WM8974GEFL/V

• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: QFN-24
• Minimum Operating Temperature: - 25 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

WM8974
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GRAPHIC EQUALISER
Table 29 EQ DAC or ADC Path Select
Table 30 EQ Band 1 Control
Table 31 EQ Band 2 Control
Table 32 EQ Band 3 Control
A 5-band graphic EQ is provided, which can be applied to the ADC or DAC path under control of the
EQMODE register bit.
The equaliser consists of low and high frequency shelving filters (Band 1 and 5) and three peak
filters for the centre bands. Each has adjustable cut-off or centre frequency, and selectable boost
(+/- 12dB in 1dB steps). The peak filters have selectable bandwidth.
R18
EQ Control 1
R18
EQ Band 1
Control
R19
EQ Band 2
Control
R20
EQ Band 3
Control
REGISTER
REGISTER
REGISTER
REGISTER
ADDRESS
ADDRESS
ADDRESS
ADDRESS
8
4:0
6:5
4:0
6:5
8
4:0
6:5
8
BIT
BIT
BIT
BIT
EQMODE
EQ1G
EQ1C
EQ2G
EQ2C
EQ2BW
EQ3G
EQ3C
EQ3BW
LABEL
LABEL
LABEL
LABEL
1
01100
(0dB)
01
01100
(0dB)
01
0
01100
(0dB)
01
0
DEFAULT
DEFAULT
DEFAULT
DEFAULT
0 = Equaliser applied to ADC path
1 = Equaliser applied to DAC path
Band 1 Gain Control. See Table 35 for details.
Band 1 Cut-off Frequency:
00=80Hz
01=105Hz
10=135Hz
11=175Hz
Band 2 Gain Control. See Table 35 for details.
Band 2 Centre Frequency:
00=230Hz
01=300Hz
10=385Hz
11=500Hz
Band 2 Bandwidth Control
0=narrow bandwidth
1=wide bandwidth
Band 3 Gain Control. See Table 35 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
PD, Rev 4.5, September 2008
DESCRIPTION
DESCRIPTION
DESCRIPTION
DESCRIPTION
Production Data
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