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WM8774IFT Datasheet(PDF) 10 Page - Wolfson Microelectronics plc

Part # WM8774IFT
Description  24 - bit, 192kHz 8 - Channel Input Stereo Codec
PDF  42 Pages
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Manufacturer  WOLFSON [Wolfson Microelectronics plc]
Direct Link  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8774IFT Datasheet(HTML) 10 Page - Wolfson Microelectronics plc

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WM8774
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PP Rev 1.0 June 2002
10
DIGITAL AUDIO INTERFACE – SLAVE MODE
BCLK
DOUT
ADCLRC
DIN
DACLRC
WM8774
CODEC
DVD
Controller
Figure 4 Audio Interface – Slave Mode
BCLK
DACLRC/
ADCLRC
t
BCH
t
BCL
t
BCY
DIN
DOUT
t
LRSU
t
DS
t
LRH
t
DH
t
DD
Figure 5 Digital Audio Data Timing – Slave Mode
Test Conditions
AVDD = 5V, DVDD = 3.3V, AGND = 0V, DGND = 0V, TA = +25
oC, Slave Mode, fs = 48kHz, 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
DIN set-up time to BCLK
rising edge
tDS
10
ns
DIN hold time from BCLK
rising edge
tDH
10
ns
DOUT propagation delay
from BCLK falling edge
tDD
0
10
ns
Table 3 Digital Audio Data Timing – Slave Mode
Note:
1.
ADCLRC and DACLRC should be synchronous with MCLK, although the WM8774 interface is tolerant of phase
variations or jitter on these signals.



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