Datasheet

Data Sheet SSM2603
Rev. C | Page 23 of 32
ANALOG AUDIO PATH, ADDRESS 0x04
Table 19. Analog Audio Path Register Bit Map
D8 D7 D6 D5 D4 D3 D2 D1 D0
0
SIDETONE_ATT[1:0]
SIDETONE_EN
DACSEL
Bypass
INSEL
MUTEMIC
MICBOOST
Table 20. Descriptions of Analog Audio Path Register Bits
Bit Name Description Settings
SIDETONE_ATT[1:0] Microphone sidetone gain control. 00 = −6 dB (default)
01 = −9 dB
10 = −12 dB
11 = −15 dB
SIDETONE_EN Sidetone enable. Allows attenuated microphone signal to
be mixed at device output terminal.
0 = sidetone disable (default)
1 = sidetone enable
DACSEL DAC select. Allows DAC output to be mixed at device
output terminal.
0 = do not select DAC (default)
1 = select DAC
Bypass Bypass select. Allows line input signal to be mixed at
device output terminal.
0 = bypass disable
1 = bypass enable (default)
INSEL Line input or microphone input select to ADC. 0 = line input select to ADC (default)
1 = microphone input select to ADC
MUTEMIC Microphone mute control to ADC. 0 = mute on data path to ADC disable
1 = mute on data path to ADC enable (default)
MICBOOST Primary microphone amplifier gain booster control. 0 = 0 dB (default)
1 = 20 dB
DIGITAL AUDIO PATH, ADDRESS 0x05
Table 21. Digital Audio Path Register Bit Map
D8 D7 D6 D5 D4 D3 D2 D1 D0
0 0 0 0 HPOR DACMU DEEMPH[1:0] ADCHPF
Table 22. Descriptions of Digital Audio Path Register Bits
Bit Name Description Settings
HPOR Stores dc offset when high-pass filter is disabled 0 = clear offset (default)
1 = store offset
DACMU DAC digital mute 0 = no mute (signal active)
1 = mute (default)
DEEMPH[1:0] De-emphasis control 00 = no de-emphasis (default)
01 = 32 kHz sampling rate
10 = 44.1 kHz sampling rate
11 = 48 kHz sampling rate
ADCHPF ADC high-pass filter control 0 = ADC high-pass filter enable (default)
1 = ADC high-pass filter disable