Cirrus Logic CS4970x4 - Manual (Page 11)

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