WM8802
w
Digital Audio Interface Transceiver
DESCRIPTION
FEATURES
•
PLL circuit for synchronization with transferred input bi-
phase mark signal.
The WM8802 is
a digital audio interface transceiver
conforming to IEC 60958/61937 and EIAJ CP-1201. The
device supports data sampling input rates of up to 192 kHz.
Data input to the serial digital audio data input pin can also
be modulated. The WM8802 features up to 6 data inputs
and 1 data output.
•
•
Input sampling frequency: 32kHz to 192kHz
Outputs clocks: fs, fs/2, 2fs, 32fs, 64fs, 128fs, 256fs,
384fs, and 512fs.
•
4-Wire CCB MPU Serial Control or Hardware Default
Interface
Data can be demodulated using the on-board PLL or with
the use of an external clock source.
•
•
Master or Slave Clocking Mode
Programmable Audio Data Interface Modes
The WM8802 is controlled via a 4-wire CCB compatible
control interface. This interface provides access to the
channel status bits. The WM8802 also provides a number
of flag outputs including PCM data valid, de-emphasis, lock
and IEC 61937, DTS-CD/LD detection.
−
−
I2S, Left, Right Justified
16/20/24/32 bit Word Lengths
•
•
3.3V Digital supply Operation
5V tolerant digital input ports
The device is available in a small 48-pin SQFP package.
APPLICATIONS
•
•
•
DVD Receivers
AV Amplifiers
DVD Recorders
BLOCK DIAGRAM
AUDIO/VO
CE
XMODE
INT CL
EMPH/UO
DI
W
WM8802
MICROCONTROLLER
I/F
CBIT, UBIT
RXOUT
RX0
DO
RERR
RDATA
RX1
RX2
RX3
RX4
DEMODULATION
AND
LOCK DETECT
DATA
SELECTOR
INPUT
SELECTOR
RX5/VI
RX6/UI
SDIN
PLL
RMCK
LPF
RBCK
CLOCK
SELECTOR
RLRCK
TMCLK/GPIO0
TBCLK/GPIO1
TLRCLK/GPIO2
TDATA/GPIO3
MODULATION
AND
PARALLEL PORT
SBCK
1/N
SLRCK
TXO/GPIOEN
CKST
XMCLK
XOUT
XIN
WOLFSON MICROELECTRONICS plc
Product Preview, April 2004, Rev 1.1
Copyright 2004 Wolfson Microelectronics plc
w :: www.wolfsonmicro.com