Rainbow Electronics MAX98089 - Manual (Page 98)

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MAX98089
Low-Power, Stereo Audio Codec
with FlexSound Technology
Receiver Output Mixer
The IC’s receiver amplifier accepts input from the stereo DAC, the line inputs (single-ended or differential), and the MIC
inputs. Configure the mixer to mix any combination of the available sources. When more than one signal is selected, the
mixed signal can be configured to attenuate 6dB, 9dB, or 12dB.
Table 20. Receiver Output Mixer Register
REGISTER BIT NAME DESCRIPTION
0x28
7
MIXRECL
Left Receiver Output Mixer
1xxxxxxx = Right DAC
x1xxxxxx = MIC2
xx1xxxxx = MIC1
xxx1xxxx = INB2 (INBDIFF = 0) or INB2-INB1 (INADIFF = 1)
xxxx1xxx = INB1
xxxxx1xx = INA2 (INADIFF = 0) or INA2-INA1 (INADIFF = 1)
xxxxxx1x = INA1
xxxxxxx1 = Left DAC
6
5
4
3
2
1
0
0x29
7
MIXRECR
Right Receiver Output Mixer
1xxxxxxx = Left DAC
x1xxxxxx = MIC2
xx1xxxxx = MIC1
xxx1xxxx = INB2 (INBDIFF = 0) or INB2-INB1 (INBDIFF = 1)
xxxx1xxx = INA1
xxxxx1xx = INA2 (INADIFF = 0) or INA2-INA1 (INADIFF = 1)
xxxxxx1x = INA1
xxxxxxx1 = Right DAC
6
5
4
3
2
1
0
0x2A
7 LINE_MODE
Receiver Output Mode. Configures receive path output mode between BTL and
stereo line output.
0 = BTL
1 = Stereo line output
3
MIXRECR
_GAIN
Right Receiver Mixer Gain Select
00 = 0dB
01 = -6dB
10 = -9dB
11 = -12dB
2
1
MIXRECL
_GAIN
Left Receiver Mixer Gain Select
00 = 0dB
01 = -6dB
10 = -9dB
11 = -12dB
0
0