Cirrus-logic CS4271 User Manual Page 25

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CS4271
DS592F1 25
5.1.3.2 Clock Ratio Selection
Depending on the use of an external crystal, or whether the CS4271 is in Master or Slave Mode, different
MCKL/LRCK and SCLK/LRCK ratios may be used. These ratios are shown in the Tables 3 and 4 below.
Table 3. Clock Ratios - Stand Alone Mode With External Crystal
External Crystal Used, MCLK=Output
Master Mode
MCLK/LRCK SCLK/LRCK LRCK
Single Speed 256 64 Fs
Double Speed 128 64 Fs
Quad Speed 128 64 Fs
Slave Mode
MCLK/LRCK SCLK/LRCK LRCK
Single Speed 256 32, 64, 128 Fs
Double Speed 128 32, 64 Fs
Quad Speed 128 32, 64 Fs
Table 4. Clock Ratios - Stand Alone Mode Without External Crystal
External Crystal Not Used, MCLK=Input
Master Mode
MCLK/LRCK SCLK/LRCK LRCK
Single Speed 256 64 Fs
Double Speed 128 64 Fs
Quad Speed 64 32 Fs
Slave Mode
MCLK/LRCK SCLK/LRCK LRCK
Single Speed
256 32, 64, 128 Fs
384 32, 48, 64, 96, 128 Fs
512 32, 64, 128 Fs
Double Speed
128 32, 64 Fs
192 32, 48, 64 Fs
256 32, 64 Fs
Quad Speed
64 32 Fs
96 48 Fs
128 32, 64 Fs
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