CS48500 View Datasheet(PDF) - Cirrus Logic
Part Name
Description
Manufacturer
CS48500 Datasheet PDF : 28 Pages
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5.7 Switching Characteristics — XTI
CS48500 Data Sheet
32-bit Audio Decoder DSP Family
Parameter
Symbol
Min
Max
Unit
External Crystal operating frequency
Fxtal
10
30
MHz
XTI period
Tclki
33.3
100
ns
XTI high time
Tclkih
13.3
-
ns
XTI low time
Tclkil
13.3
External Crystal Load Capacitance (parallel resonant)1
CL
10
-
ns
18
pF
External Crystal Equivalent Series Resistance
ESR
50
Ω
1.CL refers to the total load capacitance as specified by the crystal manufacturer. Crystals which require a
CL outside this range should be avoided. The crystal oscillator circuit design should follow the crystal man-
T ufacturer’s recommendation for load capacitor selection.
DRAF XTI
t clkih
Tclki
t clkil
Figure 2. XTI Timing
L I 5.8 Switching Characteristics — Internal Clock
TIA PH Parameter
Internal DCLK frequency1
CONFIDENDEL Internal DCLK period1
Symbol
Min
Fdclk
-
CS4852x-CQZ
Fxtal
CS4854x-CQZ
Fxtal
CS4856x-CQZ
Fxtal
CS4852x-DQZ
Fxtal
CS4854x-DQZ
Fxtal
CS4856x-DQZ
DCLKP
-
CS4852x-CQZ
6.7
CS4854x-CQZ
6.7
CS4856x-CQZ
6.7
CS4852x-DQZ
6.7
CS4854x-DQZ
6.7
CS4856x-DQZ
6.7
Max
150
150
150
150
150
1/Fxtal
1/Fxtal
1/Fxtal
1/Fxtal
1/Fxtal
1/Fxtal
Unit
MHz
ns
1. After initial power-on reset, Fdclk = Fxtal. After initial kickstart commands, the PLL is locked to max Fdclk
and remains locked until the next power-on reset.
DS734A3
©Copyright 2006 Cirrus Logic, Inc.
15
CONFIDENTIAL
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