CS42426
4.5.4.4 OLM Config #4
This One-Line Mode configuration can support up to 6 channels of DAC data on 2 DAC_SDIN pins and 2
channels of ADC data and will handle up to 24-bit samples at a sampling frequency of 48 kHz on all chan-
nels for both the DAC and ADC. The output data stream of the internal ADCs can be configured to run at
the DAC_SP clock speeds or to run at the ADC_SP rate. The DAC_SP and ADC_SP can operate at differ-
ent Fs rates.
Register / Bit Settings
Description
Functional Mode Register (addr = 03h)
Set DAC_FMx = 00,01,10
DAC_LRCK can run at SSM, DSM, or QSM independent of ADC_LRCK
ADC_LRCK can run at SSM, DSM, or QSM independent of DAC_LRCK
Set ADC_FMx = 00,01,10
Configure ADC_SDOUT to be clocked from the ADC_SP or DAC_SP
clocks.
Set ADC_CLK_SEL = 0 or 1
Interface Format Register (addr = 04h)
Set DIFx bits to proper serial format
Select the digital interface format when not in One-Line Mode
Set ADC operating mode to Not One-Line Mode since only 2 channels of
ADC are supported
Set ADC_OLx bits = 00
Set DAC_OLx bits = 00,01,10
Select DAC operating mode, see table below for valid combinations
Misc. Control Register (addr = 05h)
Set DAC_SP M/S = 0 or 1
Set DAC Serial Port to Master Mode or Slave Mode.
Set ADC Serial Port to Master Mode or Slave Mode.
External ADCs are not used. Leave bit in default state.
Set ADC_SP M/S = 0 or 1
Set EXT ADC SCLK = 0
DAC Mode
Not One-Line Mode
DAC_SCLK=64Fs/128Fs
Not One- DAC_LRCK=SSM/DSM/QSM DAC_LRCK=SSM/DSM
Line Mode ADC_SCLK=64Fs/128Fs ADC_SCLK=64Fs/128Fs
One-Line Mode #1
One-Line Mode #2
DAC_SCLK=256Fs
DAC_LRCK=SSM
DAC_SCLK=128Fs
ADC_SCLK=64Fs/128Fs
ADC_LRCK=SSM/DSM/QSM ADC_LRCK=SSM/DSM/QSM ADC_LRCK=SSM/DSM/QSM
ADC Mode
One-Line
Mode #1
not valid
not valid
not valid
not valid
not valid
not valid
One-Line
Mode #2
MCLK
64Fs,128Fs
SCLK_PORT1
ADC_SCLK
ADC_LRCK
ADC_SDOUT
LRCK_PORT1
SDIN_PORT1
RMCK
ADCIN1
ADCIN2
SDIN_PORT2
64Fs,128Fs, 256Fs
SCLK_PORT2
DAC_SCLK
LRCK_PORT2
DAC_LRCK
DAC_SDIN1
DAC_SDIN2
SDOUT1_PORT2
SDOUT2_PORT2
SDOUT3_PORT2
DAC_SDIN3
DIGITAL AUDIO
PROCESSOR
CS42426
Figure 20. OLM Configuration #4
34
DS604F1
CIRRUS [ CIRRUS LOGIC ]
