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CS48DV2B

32-bit Audio DSP

Cirrus Logic 

CS48DV2B Data Sheet

32-bit Audio DSP for Dedicated Dolby Volume and Audistry by Dolby

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

Min

Trstl

1

Trst2z

-

Trstsu

50

Trsthld

20

Max

Unit

-

ms

100

ns

-

ns

-

ns

RESET

HS[3:0]

All Bidirectional

Pins

Trst2z

Trstl

DRAFT Trstsu Trsthld

Figure 1. RESET Timing

L I 5.7 Switching Characteristics — XTI

IA H Parameter

External Crystal operating frequency1

T P XTI period

N L XTI high time

XTI low time

E E External Crystal Load Capacitance (parallel resonant)2

External Crystal Equivalent Series Resistance

Symbol

Fxtal

Tclki

Tclkih

Tclkil

CL

ESR

Min

11.2896

33.3

13.3

13.3

10

Max

Unit

27

MHz

100

ns

-

ns

-

ns

18

pF

50

Ω

ID D 1. Part characterized with the following crystal frequency values: 11.2896, 12.288, 18.432, 24.576, & 27 MH.z

2. CL refers to the total load capacitance as specified by the crystal manufacturer. Crystals that 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.

NF XTI

CO tclkih

t clkil

Tclki

Figure 2. XTI Timing

12

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DS875F2

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