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Digital Audio Interface Receiver
DESCRIPTION
The WM8803 is a digital audio interface receiver conforming
to IEC 60958/61937 and EIAJ CP-1201. It supports input
audio data rates up to 192kHz and a maximum output data
length of 24 bits.
The WM8803 has a flexible digital output port that allows the
user access to channel status pre-emphasis information, input
signal sampling frequency, sub-code Q data with the
associated CRC flags and other status data.
The WM8803 can output an externally input clock signal that
can be used as an ADC converter clock when the PLL is
unlocked. It also maintains the continuity of the output clock
when the clock is switched.
The WM8803 includes a built-in oscillator and serial data
input circuits and allows the system micro-controller to read
the sub-code Q data and the channel status. It provides
several low-power modes, thus supporting applications that
require long battery life, such as portable audio devices and
PDAs.
The device is available in a 24-pin TSSOP package.
WM8803
FEATURES
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PLL circuit for synchronization with transferred input bi-
phase mark signal.
Input sampling frequency: 32kHz to 192kHz
Outputs clocks: fs, 64fs, and one of 128fs, 256fs, 384fs,
and 512fs.
4-Wire CCB MPU Serial Control or Hardware Default
Interface
Master Clocking Mode
Programmable Audio Data Interface Modes
−
I
2
S, Left, Right Justified
−
16/20/24/32 bit Word Lengths
3.3V Digital supply Operation
5V tolerant digital input ports
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APPLICATIONS
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DVD Receivers
DVD-R/W Players
Audio Video Receivers
Portable Music Players
BLOCK DIAGRAM
DI
CL
CE
AUDIO
PD
W
WM8803
DO
MICROCONTROLLER INTERFACE
DVDD
DGND
FS
CALCULATOR
E/INT
C&U
UGPI
DEMODULATION
AND LOCK
DETECTION
RXIN
DATA
BUFFER
ERROR
LPF
PLL
CLOCK
SELECTOR
AUDIO
INTERFACE
CLKOUT
BCLK
LRCLK
SDATO
XIN
AMP
XOUT
AVDD AGND
SDIN
WOLFSON MICROELECTRONICS plc
w :: www.wolfsonmicro.com
Product Preview, September 2003, Rev 1.1
Copyright
2003
Wolfson Microelectronics plc
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
