Cirrus-logic CS4970x4 Manual de usuario Pagina 11

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CS4970x4 Data Sheet
32-bit High Definition Audio Decoder DSP Family
DS752F1 11
5.6 Switching Characteristics—RESET
Figure 1. RESET Timing
5.7 Switching Characteristics — XTI
Figure 2. XTI Timing
Parameter Symbol Min Max Unit
RESET minimum pulse width low
T
rstl
1—s
All bidirectional pins high-Z after RESET low
T
rst2z
100 ns
Configuration pins setup before RESET high
T
rstsu
50 ns
Configuration pins hold after RESET high
T
rsthld
20 ns
Parameter Symbol Min Max Unit
External Crystal operating frequency
1
1. Part characterized with the following crystal frequency values: 12.288 and 24.576 MHz.
F
xtal
12.288 24.576 MHz
XTI period
T
clki
41 81.4 ns
XTI high time
T
clkih
16.4 ns
XTI low time
T
clkil
16.4 ns
External Crystal Load Capacitance (parallel resonant)
2
2. C
L
refers to the total load capacitance as specified by the crystal manufacturer. Crystals which require a C
L
outside this range
should be avoided. The crystal oscillator circuit design should follow the crystal manufacturer’s recommendation for load capacitor
selection.
C
L
10 18 pF
External Crystal Equivalent Series Resistance
ESR 50
RESET#
T
rst2z
T
rstl
T
rstsu
T
rsthld
HS[3:0]
All Bidirectional
Pins
t
clkih
t
clkil
T
clki
XTI
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