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WM8281ECS/R Datasheet(PDF) 31 Page - Cirrus Logic

Part # WM8281ECS/R
Description  Low Power Audio System with Ambient Noise Cancellation and Echo Cancellation
PDF  392 Pages
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Manufacturer  CIRRUS [Cirrus Logic]
Direct Link  http://www.cirrus.com
Logo CIRRUS - Cirrus Logic

WM8281ECS/R Datasheet(HTML) 31 Page - Cirrus Logic

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WM8281
Rev 4.0
31
SIGNAL TIMING REQUIREMENTS
SYSTEM CLOCK & FREQUENCY LOCKED LOOP (FLL)
MCLK
tMCLKL
tMCLKH
tMCLKY
VIH
VIL
Figure 1 Master Clock Timing
Test Conditions
The following timing information is valid across the full range of recommended operating conditions.
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Master Clock Timing (MCLK1, MCLK2)
MCLK cycle time
MCLK as input to FLL,
FLLn_REFCLK_DIV=00
74
ns
MCLK as input to FLL,
FLLn_REFCLK_DIV=01
37
MCLK as input to FLL,
FLLn_REFCLK_DIV=10
18
MCLK as input to FLL,
FLLn_REFCLK_DIV=11
12.5
MCLK as direct SYSCLK or
ASYNCCLK source
40
MCLK duty cycle
MCLK as input to FLL
80:20
20:80
%
MCLK as direct SYSCLK or
ASYNCCLK source
60:40
40:60
MCLK2 frequency
Sleep Mode
32.768
kHz
Frequency Locked Loops (FLL1, FLL2)
FLL input frequency
FLLn_REFCLK_DIV=00
0.032
13.5
MHz
FLLn_REFCLK_DIV=01
0.064
27
FLLn_REFCLK_DIV=10
0.128
54
FLLn_REFCLK_DIV=11
0.256
80
FLL synchroniser input
frequency
FLLn_SYNCCLK_DIV=00
0.032
13.5
MHz
FLLn_SYNCCLK_DIV=01
0.064
27
FLLn_SYNCCLK_DIV=10
0.128
54
FLLn_SYNCCLK_DIV=11
0.256
80



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