CS485NI-XYZR View Datasheet(PDF) - Cirrus Logic

Part Name

Description

Manufacturer

CS485NI-XYZR

32-bit Audio Decoder DSP Family

Cirrus Logic 

CS485xx Family Data Sheet

32-bit 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

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 Parameter

H External Crystal operating frequency1

T P XTI period

XTI high time

N L XTI low time

External Crystal Load Capacitance (parallel resonant)2

E E 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

W

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.

CONF XTI

t clkih

Tclki

t clkil

Figure 2. XTI Timing

12

©Copyright 2008 Cirrus Logic, Inc.

DS734F2

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