CS4270-CZZR Cirrus Logic Inc, CS4270-CZZR Datasheet - Page 25

• Manufacturer Part Number: CS4270-CZZR
• Description: 24-bit, 192kHz Stereo Codec
• Manufacturer: Cirrus Logic Inc

DS686A1
5.2.3 System Clocking
5.2.4 Clock Ratio Selection
Single-Speed
Double-Speed
Quad-Speed
Single-Speed
The CS4270 will operate at sampling frequencies from 4 kHz to 216 kHz. This range is divided into three
speed modes as shown in
In Control Port Master Mode, the user must configure the mode bits (M0, M1, M2) to set the speed mode
and select the appropriate clock ratios. Depending on whether the CS4270 is in Master or Slave Mode,
different MCLK/LRCK and SCLK/LRCK ratios may be used. These ratios as well as the Control Port Reg-
ister Bits are shown in
MCLK/LRCK
MCLK/LRCK
1024
1024
256
384
512
768
128
192
256
384
512
128
192
256
256
384
512
768
64
96
Table
Single-Speed
Double-Speed
Quad-Speed
Table
Table 5. Clock Ratios - Control Port Mode
5,
Table 9
Mode
4.
32, 48, 64, 96, 128
32, 48, 64, 96, 128
Table 4. Speed Modes
SCLK/LRCK
SCLK/LRCK
32, 64, 128
32, 64, 128
32, 64, 128
and
Master Mode
Slave Mode
64
64
64
64
64
64
64
64
64
64
64
64
64
64
64
Section 8.3 on page
Sampling Frequency
100-216 kHz
50-108 kHz
4-54 kHz
LRCK
LRCK
Fs
Fs
Fs
Fs
Fs
Fs
Fs
Fs
Fs
Fs
Fs
Fs
Fs
Fs
Fs
Fs
Fs
Fs
Fs
Fs
35.
Freq<2>
Freq<2>
MCLK
MCLK
0
0
0
0
1
0
0
0
0
1
0
0
0
0
1
0
0
0
0
1
Freq<1>
Freq<1>
MCLK
MCLK
0
0
1
1
0
0
0
1
1
0
0
0
1
1
0
0
0
1
1
0
CS4270
Freq<0>
Freq<0>
MCLK
MCLK
0
1
0
1
0
0
1
0
1
0
0
1
0
1
0
0
1
0
1
0
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