WM8972L Просмотр технического описания (PDF) - Wolfson Microelectronics plc

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WM8972L

Mono CODEC for Portable Audio Applications

Wolfson Microelectronics plc 

Preliminary Technical Data

SIGNAL TIMING REQUIREMENTS

SYSTEM CLOCK TIMING

MCLK

tMCLKL

tMCLKH

tMCLKY

WM8972L

Figure 1 System Clock Timing Requirements

Test Conditions

CLKDIV2=0, DCVDD = 1.42V, DBVDD = 3.3V, DGND = 0V, TA = +25oC, Slave Mode fs = 48kHz, MCLK = 384fs, 24-bit data,

unless otherwise stated.

PARAMETER

SYMBOL

MIN

TYP

MAX

UNIT

System Clock Timing Information

MCLK System clock pulse width high

TMCLKL

21

ns

MCLK System clock pulse width low

TMCLKH

21

ns

MCLK System clock cycle time

TMCLKY

54

ns

MCLK duty cycle

TMCLKDS

60:40

40:60

Test Conditions

CLKDIV2=1, DCVDD = 1.42V, DBVDD = 3.3V, DGND = 0V, TA = +25oC, Slave Mode fs = 48kHz, MCLK = 384fs, 24-bit data,

unless otherwise stated.

PARAMETER

SYMBOL

MIN

TYP

MAX

UNIT

System Clock Timing Information

MCLK System clock pulse width high

TMCLKL

10

ns

MCLK System clock pulse width low

TMCLKH

10

ns

MCLK System clock cycle time

TMCLKY

27

ns

AUDIO INTERFACE TIMING – MASTER MODE

BCLK

(Output)

ADCLRC/

DACLRC

(Outputs)

ADCDAT

tDL

tDDA

DACDAT

tDST

tDHT

Figure 2 Digital Audio Data Timing – Master Mode (see Control Interface)

w

PTD Rev 2.2 June 2004

9

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