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WM8731 Datasheet(PDF) 14 Page - Wolfson Microelectronics plc

Part # WM8731
Description  Portable Internet Audion CODEC with Headphone Driver and Programmable Sample Rates
PDF  56 Pages
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Manufacturer  WOLFSON [Wolfson Microelectronics plc]
Direct Link  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8731 Datasheet(HTML) 14 Page - Wolfson Microelectronics plc

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WM8731
Advanced Information
WOLFSON MICROELECTRONICS LTD
AI Rev 2.0 February 2001
14
DIGITAL AUDIO INTERFACE – SLAVE MODE
BCLK
ADCDAT
ADCLRC
DACDAT
DACLRC
WM8731
CODEC
DSP
ENCODER/
DECODER
Note: The ADC and DAC can run at different rates
Figure 5 Slave Mode Connection
BCLK
DACLRC/
ADCLRC
t
BCH
t
BCL
t
BCY
DACDAT
ADCDAT
t
LRSU
t
DS
t
LRH
t
DH
t
DD
Figure 6 Digital Audio Data Timing – Slave Mode
Test Conditions
AVDD, HPVDD, DBVDD = 3.3V, AGND = 0V, DCVDD = 1.5V, DGND = 0V, TA = +25
oC, Slave Mode, fs = 48kHz, XTI/MCLK =
256fs unless otherwise stated.
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Audio Data Input Timing Information
BCLK cycle time
tBCY
50
ns
BCLK pulse width high
tBCH
20
ns
BCLK pulse width low
tBCL
20
ns
DACLRC/ADCLRC set-up
time to BCLK rising edge
tLRSU
10
ns
DACLRC/ADCLRC hold
time from BCLK rising edge
tLRH
10
ns
DACDAT set-up time to
BCLK rising edge
tDS
10
ns
DACDAT hold time from
BCLK rising edge
tDH
10
ns
ADCDAT propagation delay
from BCLK falling edge
tDD
010
ns



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