WM8731CSEFL/R View Datasheet(PDF) - Cirrus Logic

Part Name

Description

MFG CO.

WM8731CSEFL/R

Portable Internet Audio CODEC with Headphone Driver and Programmable Sample Rates

Cirrus Logic 

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WM8731 / WM8731L

DIGITAL AUDIO INTERFACE – SLAVE MODE

Production Data

BCLK

ADCLRC

WM8731

CODEC

DACLRC

ADCDAT

DACDAT

Note: The ADC and DAC can run at different rates

Figure 5 Slave Mode Connection

BCLK

DACLRC/

ADCLRC

DACDAT

ADCDAT

tBCH

tBCL

tBCY

tDS

tDD

DSP

ENCODER/

DECODER

tLRH

tDH

tLRSU

Figure 6 Digital Audio Data Timing – Slave Mode

Test Conditions

AVDD, HPVDD, DBVDD = 3.3V, AGND = 0V, DCVDD = 1.5V, DGND = 0V, TA = +25oC, Slave Mode, fs = 48kHz, XTI/MCLK =

256fs unless otherwise stated.

PARAMETER

SYMBOL

Audio Data Input Timing Information

BCLK cycle time

BCLK pulse width high

BCLK pulse width low

DACLRC/ADCLRC set-up

time to BCLK rising edge

tBCY

tBCH

tBCL

tLRSU

DACLRC/ADCLRC hold

tLRH

time from BCLK rising edge

DACDAT set-up time to

tDS

BCLK rising edge

DACDAT hold time from

tDH

BCLK rising edge

TEST CONDITIONS

MIN

TYP

MAX

UNIT

50

ns

20

ns

20

ns

10

ns

10

ns

10

ns

10

ns

w

PD, Rev 4.9, October 2012

17

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