CS42435-CMZ Cirrus Logic Inc, CS42435-CMZ Datasheet - Page 33

• Manufacturer Part Number: CS42435-CMZ
• Description: IC,Soundcard Circuits,CMOS,QFP,52PIN,PLASTIC
• Manufacturer: Cirrus Logic Inc

DS685F1
5.5.2
5.6
5.6.1
5.6.2
5.6.3
AUX_LRCK
AUX_SCLK
ADC_SDOUT
AUX_SDIN
DAC_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 (FS on the TDM interface). If the AUX_SDIN signal is
not being used, it should be tied to AGND via a pull-down resistor.
SCLK
FS
and must be held valid for at least 1 SCLK period.
Note:
FS
I/O Channel Allocation
Hardware Mode
The AUX port will only operate in the Left-Justified digital interface format and supports bit depths ranging
from 16 to 24 bits (see
AUX_SCLK).
Software Mode
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
dress 04h)” on page
I²S
DAC_SDIN
ADC_SDOUT
Digital Input/Output
is sampled as valid on the rising SCLK edge preceding the most significant bit of the first data sample
LSB
MSB
MSB
The ADC does not meet the timing requirements for proper operation in Quad-Speed Mode.
M S B
32 clks
32 clks
AOUT1
AIN1
LSB
LSB
Bit or Word Wide
MSB
MSB
42.
L eft C h a n n el
32 clks
32 clks
AUX1
AOUT2
TDM
TDM
AIN2
Table 4. Serial Audio Interface Channel Allocations
Interface
LSB
LSB
Format
Figure 17 on page 35
Figure 13. TDM Serial Audio Format
MSB
MSB
Figure 14. AUX I²S Format
AOUT3
32 clks
32 clks
AIN3
LSB
LSB
AOUT 1,2,3,4,5,6,7,8
AIN 1,2,3,4 (2 additional channels from AUX_SDIN)
L S B
MSB
MSB
32 clks
32 clks
AOUT4
AIN4
LSB
LSB
256 clks
Analog Output/Input Channel Allocation
for timing relationship between AUX_LRCK and
MSB
MSB
M S B
AOUT5
32 clks
32 clks
-
LSB
LSB
from/to Digital I/O
MSB
MSB
R ig ht C h a n n el
AOUT6
32 clks
32 clks
AUX2
-
LSB
LSB
MSB
MSB
“Miscellaneous Control (Ad-
32 clks
32 clks
AOU7
AUX1
LSB
LSB
L S B
MSB
MSB
AOUT8
32 clks
32 clks
AUX2
CS42435
LSB
LSB
MSB
MSB
MSB
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