CS42428-CQZ Cirrus Logic Inc, CS42428-CQZ Datasheet - Page 24

• Manufacturer Part Number: CS42428-CQZ
• Description: IC CODEC 8CH PLL 192KHZ 64-LQFP
• Manufacturer: Cirrus Logic Inc
• Type: Audio Codecr

Specifications of CS42428-CQZ

• Data Interface: Serial
• Resolution (bits): 24 b
• Number Of Adcs / Dacs: 2 / 8
• Sigma Delta: Yes
• Dynamic Range, Adcs / Dacs (db) Typ: 114 / 114
• Voltage - Supply, Analog: 4.75 V ~ 5.25 V
• Voltage - Supply, Digital: 3.13 V ~ 5.25 V
• Operating Temperature: -10°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 64-LQFP
• Audio Codec Type: Stereo
• No. Of Adcs: 2
• No. Of Dacs: 8
• No. Of Input Channels: 2
• No. Of Output Channels: 15
• Adc / Dac Resolution: 24bit
• Sampling Rate: 192kSPS
• Ic Interface Type: I2C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: 598-1499 - BOARD EVAL FOR CS42428 CODEC
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 598-1031

24
4.4.2
4.4.3
4.4.4
OMCK System Clock Mode
A special clock-switching mode is available that allows the clock that is input through the OMCK pin to be
used as the internal master clock. This feature is controlled by the SW_CTRLx bits in register
trol (address 06h)” on page
ter clock functionality. The clock auto-switching mode allows the clock input through OMCK to be used as
a clock in the system without any disruption when the PLL loses lock, for example, when the LRCK is re-
moved from ADC_LRCK. This clock-switching is done glitch-free. A clock adhering to the specifications
detailed in the Switching Characteristics table on
that the FRC_PLL_LK bit is set to ‘0’ (See
Master Mode
In Master Mode, the serial interface timings are derived from an external clock attached to OMCK or from
the output of the PLL with an input reference to the ADC_LRCK input from the ADC serial port. The DAC
Serial Port and ADC Serial Port can both be masters only when OMCK is used as the clock source. When
using the PLL output, the ADC Serial Port must be slave and the DAC Serial Port can operate in Master
Mode. Master clock selection and operation is configured with the SW_CTRL1:0 bits in the Clock Control
Register (See
Slave Mode
In Slave Mode, DAC_LRCK, DAC_SCLK and/or ADC_LRCK and ADC_SCLK operate as inputs. The
Left/Right clock signal must be equal to the sample rate, Fs, and must be synchronously derived from the
supplied master clock, OMCK, or must be synchronous to the supplied ADC_LRCK used as the input to
the PLL. In this latter scenario, the PLL output becomes the internal master clock. The supported PLL out-
put frequencies are shown in
The serial bit clock, DAC_SCLK and/or ADC_SCLK, must be synchronous to the corresponding
DAC_LRCK/ADC_LRCK and be equal to 128x, 64x, 48x or 32x Fs, depending on the interface format se-
lected and desired speed mode.
Sample
(kHz)
Rate
192
48
96
12.2880 18.4320 24.5760
256x
Sample
“Clock Control (address 06h)” on page
(kHz)
176.4
Rate
-
-
44.1
88.2
192
32
48
64
96
Single-Speed
(4 to 50 kHz)
384x
-
-
Single-Speed
(4 to 50kHz)
Table 1. Common OMCK Clock Frequencies
48. An advanced auto-switching mode is also implemented to maintain mas-
12.2880
11.2896
8.1920
256x
Table
512x
-
-
-
-
-
-
-
2.
12.2880 18.4320 24.5760
128x
PLL Output (MHz)
-
-
“Force PLL Lock (FRC_PLL_LK)” on page
Double-Speed
(50 to 100kHz)
(50 to 100 kHz)
Double-Speed
OMCK (MHz)
16.3840
22.5792
24.5760
256x
192x
page 11
-
-
-
-
-
-
-
48).
256x
must be applied to the OMCK pin at all times
-
-
(100 to 192kHz)
Quad-Speed
12.2880 18.4320 24.5760
45.1584
49.1520
64x
256x
-
-
(100 to 192 kHz)
-
-
-
-
-
-
Quad-Speed
96x
-
-
128x
49).
-
-
CS42428
“Clock Con-
DS605F1