CS4970X4 Datasheet, PDF (12/36 Pages) Cirrus Logic – 32-bit High Definition Audio Decoder DSP Family

CS4970x4 Data Sheet
32-bit High Definition Audio Decoder DSP Family
5.6 Switching Characteristics— RESET
Parameter
RESET# minimum pulse width low
All bidirectional pins high-Z after RESET# low
Configuration pins setup before RESET# high
Configuration pins hold after RESET# high
Symbol
T_rstl
T_rst2z
T_rstsu
T_rsthld
Min
1
-
50
20
Max
Unit
-
μs
100
ns
-
ns
-
ns
RESET#
HS[3:0]
All Bidirectional
Pins
T_rst2z
T_rstl
T_rstsu T_rsthld
Figure 1. RESET Timing
5.7 Switching Characteristics — XTI
Parameter
External Crystal operating frequency¹
XTI period
XTI high time
XTI low time
External Crystal Load Capacitance (parallel resonant)²
External Crystal Equivalent Series Resistance
Symbol
F_xtal
T_clki
T_clkih
T_clkil
C_L
ESR
Min
11.2896
33.3
13.3
13.3
10
Max
Unit
27
MHz
100
ns
-
ns
-
ns
18
pF
50
W
1. Part characterized with the following crystal frequency values: 11.2896, 12.288, 18.432, 24.576, and 27 MHz.
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.
XTI
t clkih
T_clki
t clkil
Figure 2. XTI Timing
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