Table 17. eq registers – Rainbow Electronics MAX98089 User Manual
Page 94
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MAX98089
Low-Power, Stereo Audio Codec
with FlexSound Technology
Use the attenuator at the EQ’s input to avoid clipping
the signal. The attenuator can be programmed for fixed
attenuation or dynamic attenuation based on signal level.
If the dynamic EQ clip detection is enabled, the signal
level from the EQ is fed back to the attenuator circuit to
determine the amount of gain reduction necessary to
avoid clipping.
The MAX98089 EV kit software includes a graphical inter-
face for generating the EQ coefficients. The coefficients
are sample rate dependent and stored in registers 0x52
through 0xB5.
Table 17. EQ Registers
REGISTER
BIT
NAME
DESCRIPTION
0x30/0x32
4
EQCLP1/
EQCLP2
DAI1/DAI2 EQ Clip Detection
Automatically controls the EQ attenuator to prevent clipping in the EQ.
0 = Enabled
1 = Disabled
3
DVEQ1/DVEQ2
DAI1/DAI2 EQ Attenuator
Provides attenuation to prevent clipping in the EQ when full-scale signals are
boosted. DVEQ1/DVEQ2 operates only when EQ1EN/EQ2EN = 1 and EQCLP1/EQ-
CLP2 = 1.
2
VALUE
GAIN (dB)
VALUE
GAIN (dB)
0x0
0
0x8
-8
0x1
-1
0x9
-9
1
0x2
-2
0xA
-10
0x3
-3
0xB
-11
0x4
-4
0xC
-12
0
0x5
-5
0xD
-13
0x6
-6
0xE
-14
0x7
-7
0xF
-15
0x49
7
VS2EN
See the Click-and-Pop Reduction section.
6
VSEN
5
ZDEN
1
EQ2EN
DAI2 EQ Enable
0 = Disabled
1 = Enabled
0
EQ1EN
DAI1 EQ Enable
0 = Disabled
1 = Enabled