Rainbow Electronics MAX98088 - Manual (Page 77)

Stereo Audio Codec
with FLEXSOUND Technology
MAX98088
77
Table 10. Digital Audio Interface Registers (continued)
REGISTER BIT NAME DESCRIPTION
0x15/0x1D
7
OSR1
ADC Oversampling Ratio
Use the higher setting for maximum performance. Use the lower setting for reduced
power consumption at the expense of performance.
00 = 96x
01 = 64x
10 = Reserved
11 = Reserved
6
5
DAC_OSR1/
DAC_OSR2
DAC Oversample Clock (DAC_OSR1/DAC_OSR2
1 = DAC input clock = PCLK/4
0 = DAC input clock = PCLK/2
2
BSEL1/
BSEL2
DAI1/DAI2 BCLK Output Frequency
When operating in master mode, BSEL1/BSEL2 set the frequency of BCLK. When
operating in slave mode, BSEL1/BSEL2 have no effect. Select the lowest BCLK
frequency that clocks all data input to the DAC and output by the ADC.
000 = BCLK disabled
001 = 64 x LRCLK
010 = 48 x LRCLK
011 = 128 x LRCLK (invalid for DHF1/DHF2 = 1)
100 = PCLK/2
101 = PCLK/4
110 = PCLK/8
111 = PCLK/16
1
0
0x16/0x1E
7
SEL1/SEL2
DAI1/DAI2 Audio Port Selector
Selects which port is used by DAI1/DAI2.
00 = None
01 = Port S1
10 = Port S2
11 = Reserved
6
5 LTEN1
DAI1 Digital Loopthrough
Connects the output of the record signal path to the input of the playback path. Data
input to DAI1 from an external device is mixed with the recorded audio signal.
0 = Disabled
1 = Enabled
4
LBEN1/
LBEN2
DAI1/DAI2 Digital Audio Interface Loopback
LBEN1 routes the digital audio input to DAI1 back out on DAI2. LBEN2 routes the
digital audio input to DAI2 back out on DAI2. Selecting LBEN2 disables the ADC
output data.
0 = Disabled
1 = Enabled
3
DMONO1/
DMONO2
DAI1/DAI2 DAC Mono Mix
Mixes the left and right digital input to mono and routes the combined signal to the left
and right playback paths. The left and right input data is attenuated by 6dB prior to the
mono mix.
0 = Disabled
1 = Enabled