CS49DV8 datasheet(13/30 Pages) CIRRUS

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DS868PP2

CS49DV8C Data Sheet

32-bit Audio DSP Family

5.7 Switching Characteristics — XTI

Figure 2. XTI Timing

5.8 Switching Characteristics — Internal Clock

Parameter

Symbol

Min

Max

Unit

External Crystal operating frequency1

1. Part characterized with the following crystal frequency values: 11.2896, 12.288, 18.432, 24.576, and 27

MHz.

Fxtal

11.2896

MHz

XTI period

Tclki

33.3

100

XTI high time

Tclkih

13.3

XTI low time

Tclkil

13.3

External Crystal Load Capacitance (parallel resonant)2

2. 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

manufacturer’s recommendation for load capacitor selection.

External Crystal Equivalent Series Resistance

ESR

Parameter

Symbol

Min

Max

Unit

Internal DCLK frequency1

CS49DV8C-CVZ

CS49DV8C-CVZR

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.

Fdclk

Fxtal

150

MHz

Internal DCLK period1

CS49DV8C-CVZ

CS49DV8C-CVZR

DCLKP

6.7

1/Fxtal

t clkih

t clkil

Tclki

XTI

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