16
DS792F2
CS43L22
Confidential Draft
3/4/10
SWITCHING SPECIFICATIONS - SERIAL PORT
Inputs: Logic 0 = DGND; Logic 1 = VL.
11. After powering up the CS43L22, RESET should be held low after the power supplies and clocks are
settled.
12. See “Example System Clock Frequencies” on page 61 for typical MCLK frequencies.
Parameters
Symbol
Min
Max
Units
RESET pin Low Pulse Width
1-
ms
MCLK Frequency (Note 12)
MHz
MCLK Duty Cycle
45
55
%
Slave Mode
Sample Rate (LRCK)
Fs
kHz
LRCK Duty Cycle
45
55
%
SCLK Frequency
1/tP
-64Fs
Hz
SCLK Duty Cycle
45
55
%
LRCK Setup Time Before SCLK Rising Edge
ts(LK-SK)
40
-
ns
SDIN Setup Time Before SCLK Rising Edge
ts(SD-SK)
20
-
ns
SDIN Hold Time After SCLK Rising Edge
th
20
-
ns
Master Mode
Sample Rate (LRCK)
Fs
Hz
LRCK Duty Cycle
45
55
%
SCLK Frequency
SCLK=MCLK mode
1/tP
-
12.0000
MHz
MCLK=12.0000 MHz
1/tP
-68Fs
Hz
all other modes
1/tP
-64Fs
Hz
SCLK Duty Cycle
45
55
%
SDIN Setup Time Before SCLK Rising Edge
ts(SD-SK)
20
-
ns
SDIN Hold Time After SCLK Rising Edge
th
20
-
ns
//
ts(SD-SK)
MSB
MSB-1
LRCK
SCLK
SDIN
ts(LK-SK)
tP
th
Figure 3. Serial Audio Interface Timing
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