CS42448-CQZR Cirrus Logic Inc, CS42448-CQZR Datasheet - Page 34

• Manufacturer Part Number: CS42448-CQZR
• Description: IC,Soundcard Circuits,CMOS,QFP,64PIN,PLASTIC
• Manufacturer: Cirrus Logic Inc

34
4.5.7
4.6
4.6.1
AUX_LRCK
AUX_SCLK
AUX_SDIN
AUX Port Digital Interface Formats
These serial data lines are used when supporting the TDM Mode of operation with an external ADC or
S/PDIF receiver attached. The AUX serial port operates only as a clock master. The AUX_SCLK will operate
at 64xFs, where Fs is equal to the ADC sample rate (ADC_LRCK). If the AUX_SDIN signal is not being
used, it should be tied to AGND via a pull-down resistor.
The AUX port will operate in either the Left-Justified or I²S digital interface format with bit depths ranging
from 16 to 24 bits. Settings for the AUX port are made through the register
04h)” on page
I/O Channel Allocation
I²S
DAC_SDIN1
DAC_SDIN2
DAC_SDIN3
DAC_SDIN4
ADC_SDOUT1
ADC_SDOUT2
ADC_SDOUT3
Digital Input/Output
M S B
44.
L eft C h a n n el
AUX1
I²S, LJ, RJ
OLM
TDM
I²S, LJ, RJ
OLM
TDM
I²S, LJ, RJ
OLM
TDM
I²S, LJ, RJ
OLM
TDM
I²S, LJ, RJ
OLM
TDM
I²S, LJ, RJ
OLM
TDM
I²S, LJ, RJ
OLM
TDM
Table 9. Serial Audio Interface Channel Allocations
Interface
Format
Figure 21. AUX I²S Format
AOUT 1,2
AOUT 1,2,3,4,5,6
AOUT 1,2,3,4,5,6,7,8
AOUT 3,4
Not Used
Not Used
AOUT 5,6
Not Used
Not Used
AOUT 7,8
AOUT 7,8
Not Used
AIN 1,2
AIN 1,2,3,4,5,6
AIN 1,2,3,4,5,6; (2 additional channels from AUX_SDIN)
AIN 3,4
Not Used
Not Used
AIN 5,6
Not Used
Not Used
L S B
Analog Output/Input Channel Allocation
M S B
from/to Digital I/O
R ig ht C h a n n el
AUX2
“Interface Formats (Address
L S B
CS42448
DS648F3
MSB