Cirrus Logic CS42L51 - Manual (Page 53)

DS679F1 53
CS42L51
ADC I²S or Left-Justified (ADC_I²S/LJ)
Default: 0
0 - Left-Justified
1 - I²S
Function:
Selects either the I²S or Left-Justified digital interface format for the data on SDOUT. The required relation-
ship between the Left/Right clock, serial clock and serial data is defined by the Digital Interface Format and
the options are detailed in this section .
Digital Mix (DIGMIX)
Default: 0
Function:
Selects between the ADC or a digital mix of the ADC and DAC into the serial port to the SDOUT pin. This
mix function is affected by the data select bits DATA_SEL[1:0].
Microphone Mix (MICMIX)
Default: 0
0 - Disabled; No Mix: Left/Right Channel to ADC serial port, SDOUT.
1 - Enabled; Mix: Differential mix ((A-B)/2)to ADC serial port, SDOUT.
Function:
Selects between the ADC stereo mix or a differential mix of analog inputs A and B.
6.5 MIC Control (Address 05h)
ADC Single Volume Control (ADC_SNGVOL)
Default: 0
0 - Disabled
1 - Enabled
Function:
The individual PGA Volume (PGAx_VOLx) and ADC channel attenuation (ADCx_ATTx) levels as well as
the ALC A and B enable (ALC_ENx) are independently controlled by their respective control registers when
this function is disabled. When enabled, the volume on both channels is determined by the ADCA Attenuator
Control register, or the PGAA Control register, and the ADCB Attenuator and PGAB Control registers are
ignored. The ALC enable control for channel B is controlled by the ALC A enable when the ADC_SNGVOL
bit is enabled and the ALC_ENB control register is ignored.
DIGMIX DATA_SEL[1:0] Mix Selected
0 xx No Mix: ADC to ADC serial port, SDOUT data.
1
00 No Mix: SDIN data to ADC serial port, SDOUT data.
01 Mix: ADC + SDIN data to ADC serial port, SDOUT data.
10 No Mix: ADC to ADC serial port, SDOUT data.
11 Reserved
7 6 5 4 3 2 1 0
ADC_SNGVOL ADCB_DBOOST ADCA_DBOOST MICBIAS_SEL MICBIAS_LVL1 MICBIAS_LVL0 MICB_BOOST MICA_BOOST