User Manual

DS656F3 31
CS4245
in Master Mode, and receive the proper clocks in Slave Mode. Table 2 illustrates several standard audio
sample rates and the required MCLK and LRCK frequencies.
In both Master and Slave Mo
des, the external MCLK must be divided down based on the MCLK/LRCK
ratio to achieve a post-divider MCLK/LRCK ratio of 256x for SSM, 128x for DSM, or 64x for QSM. Table 3
lists the appropriate dividers.
LRCK
(kHz)
MCL
K (MHz)
64x 96x 128x 192x 256x 384x 512x 768x 1024x
32
- ---8.1920 12.2880 16.3840 24.5760 32.7680
44.1
- ---11.2896 16.9344 22.5792 33.8680 45.1584
48
- ---12.2880 18.4320 24.5760 36.8640 49.1520
64
- - 8.1920 12.2880 16.3840 24.5760 32.7680 - -
88.2
- - 11.2896 16.9344 22.5792 33.8680 45.1584 - -
96
- - 12.2880 18.4320 24.5760 36.8640 49.1520 - -
128
8.1920 12.2880 16.3840 24.5760 32.7680 - - - -
176.4
11.2896 16.9344 22.5792 33.8680 45.1584 - - - -
192
12.2880 18.4320 24.5760 36.8640 49.1520 - - - -
Mode
QSM
DSM
SSM
Table 2. Common Clock Frequencies
MCLK/LRCK Ratio MCLK Dividers
64x --÷1
96x --÷1.5
128x -÷1÷2
192x -÷1.5÷3
256x ÷1 ÷2 ÷4
384x ÷1.5 ÷3 -
512x ÷2 ÷4 -
768x ÷3 - -
1024x ÷4 - -
Mode SSM
DSM QSM
Table 3. MCLK Dividers