Rainbow Electronics MAX98088 - Manual (Page 105)

Stereo Audio Codec
with FLEXSOUND Technology
MAX98088
105
Table 27. Headphone Output Mixer Register
Headphone Output Mixers
The headphone amplifier mixer accepts input from the
stereo DAC, the line inputs (single-ended or differen-
tial), and the MIC inputs. Configure the mixer to mix any
combination of the available sources. When more than
one signal is selected, the mixer can be configured to
attenuate the signal by 6dB, 9dB, or 12dB. The stereo
DAC can bypass the headphone mixers, and be con-
nected directly to the headphone amplifiers to provide
lower power consumption.
REGISTER BIT NAME DESCRIPTION
0x25
7
MIXHPL
Left Headphone Output Mixer
1xxxxxxx = Right DAC
x1xxxxxx = MIC1
xx1xxxxx = MIC2
xxx1xxxx = INA2 (INADIFF = 0) or INA2 - INA1 (INADIFF = 1)
xxxx1xxx = INA1
xxxxx1xx = INB2 (INBDIFF = 0) or INB2 - INB1 (INBDIFF = 1)
xxxxxx1x = INB1
xxxxxxx1 = Left DAC
6
5
4
3
2
1
0
0x26
7
MIXHPR
Right Headphone Output Mixer
1xxxxxxx = Left DAC
x1xxxxxx = MIC1
xx1xxxxx = MIC2
xxx1xxxx = INA2 (INADIFF = 0) or INA2 - INA1 (INADIFF = 1)
xxxx1xxx = INA1
xxxxx1xx = INB2 (INBDIFF = 0) or INB2 - INB1 (INBDIFF = 1)
xxxxxx1x = INB1
xxxxxxx1 = Right DAC
6
5
4
3
2
1
0
0x27
5
MIXHPR_ PATH
SEL
Right Headphone Mixer Path Select
0 = Directly connect to the right DAC (bypass right headphone output mixer)
1 = Right headphone output mixer
4
MIXHPL_ PATH
SEL
Left Headphone Mixer Path Select
0 = Directly connect to the left DAC (bypass left headphone output mixer)
1 = Left headphone output mixer
3
MIXHPR
_GAIN
Right Headphone Mixer Gain Select
00 = 0dB
01 = -6dB
10 = -9dB
11 = -12dB
2
1
MIXHPL
_GAIN
Left Headphone Mixer Gain Select
00 = 0dB
01 = -6dB
10 = -9dB
11 = -12dB
0