w
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
•
•
•
•
•
•
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
•
•
APPLICATIONS
•
•
•
•
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
WM8803
TABLE OF CONTENTS
Product Preview
DESCRIPTION .......................................................................................................1
FEATURES.............................................................................................................1
APPLICATIONS .....................................................................................................1
BLOCK DIAGRAM .................................................................................................1
TABLE OF CONTENTS .........................................................................................2
PIN CONFIGURATION...........................................................................................3
ORDERING INFORMATION ..................................................................................3
PIN DESCRIPTION ................................................................................................4
ABSOLUTE MAXIMUM RATINGS.........................................................................5
RECOMMENDED OPERATING CONDITIONS .....................................................5
ELECTRICAL CHARACTERISTICS ......................................................................6
INPUT AND OUTPUT PIN CAPACITANCE................................................................... 6
DC CHARACTERISTICS............................................................................................... 6
SYSTEM TIMING REQUIREMENTS ............................................................................. 7
SERIAL INTERFACE TIMING REQUIREMENTS.......................................................... 7
MICRO-CONTROLLER INTERFACE TIMING REQUIREMENTS ................................. 8
DEVICE DESCRIPTION.........................................................................................9
_____
SYSTEM RESET (
PD)...................................................................................................
9
LOW POWER MODES ................................................................................................. 9
CLOCKS...................................................................................................................... 11
DATA INPUT AND OUTPUT ....................................................................................... 17
ERROR OUTPUT AND PROCESSING (ERROR)....................................................... 22
CHANNEL STATUS DATA .......................................................................................... 24
__________
USER GENERAL PURPOSE INTERFACE OUTPUT PORT (
UGPI
)........................... 24
MICRO-CONTROLLER INTERFACE (E/INT, CE, CL, DI, DO) ...........................28
INTERRUPT OUTPUT (E/INT).................................................................................... 28
CCB ADDRESSES ...................................................................................................... 29
DATA WRITE PROCEDURE....................................................................................... 29
DATA READ PROCEDURE ........................................................................................ 29
I/O TIMING .................................................................................................................. 30
WRITE REGISTER TABLE ......................................................................................... 31
WRITE DATA DETAILED DOCUMENTATION............................................................ 32
READ REGISTER TABLE ........................................................................................... 37
READ DATA DETAILED DOCUMENTATION ............................................................. 38
SAMPLE APPLICATION......................................................................................41
RECOMMENDED EXTERNAL COMPONENTS ..................................................42
RECOMMENDED EXTERNAL COMPONENTS VALUES ........................................... 43
PACKAGE DIMENSIONS ....................................................................................44
IMPORTANT NOTICE ..........................................................................................45
ADDRESS: .................................................................................................................. 45
w
PP Rev 1.1 September 2003
2
Product Preview
WM8803
ORDERING INFORMATION
24
23
22
21
20
19
18
17
16
15
14
13
XIN
SDIN
SDATO
LRCLK
BCLK
CLKOUT
DGND
AGND
NC
LPF
AVDD
DVDD
DEVICE
WM8803SCDT/V
TEMP. RANGE
-30 to +70
o
C
PACKAGE
24-pin TSSOP
PIN CONFIGURATION
XOUT
ERROR
PD
NC
CE
CL
DI
DO
E/INT
AUDIO
UGPI
RXIN
1
2
3
4
5
6
7
8
9
10
11
12
w
PP Rev 1.1 September 2003
3
WM8803
PIN DESCRIPTION
PIN
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
Notes:
1.
2.
3.
Micro-controller register output or clock switching transition period signal.
128fs, 256fs, 384fs, 512fs, or oscillator amplifier outputs
Other than I
2
S mode;
I S mode;
4.
5.
2
Product Preview
NAME
XOUT
ERROR
PD
5
TYPE
Analogue Output
Digital Output
Digital Input
Digital Input
Digital Input
Digital Input
Digital Input
Digital Output
Digital Output
Digital Output
Digital Output
Digital Input
Supply
Supply
Analogue Output
Supply
Supply
Digital Output
Digital Output
Digital Output
Digital Output
Digital Input
Digital Input
DESCRIPTION
Oscillation amplifier circuit output pin
PLL lock error and data error output pin
System reset and low power mode control input pin (5V tolerant)
Non connection
Micro-controller interface: chip enable input pin (5V tolerant)
Micro-controller interface: serial clock input pin (5V tolerant)
Micro-controller interface: write data input pin (5V tolerant)
Micro-controller interface: read data output pin
Pre-emphasis detection or micro-controller interface interrupt output pin
Channel status bit 1 non-PCM data detection output pin
User general purpose interface output pin
1
Digital data input pin (5V tolerant)
Digital system power supply
Analog system power supply
PLL loop filter connection pin
No connection
Analog system ground
Digital system ground
System clock output pin
2
64fs clock output pin
Fs clock output pin
3
Demodulated data output pin
Serial digital data input pin (5V tolerant)
Oscillation amplifier element connection or external clock input pin
NC
CE
CL
DI
5
5
5
DO
E / INT
AUDIO
UGPI
RXIN
5
DVDD
AVDD
LPF
NC
AGND
DGND
CLKOUT
BCLK
LRCLK
SDATO
SDIN
XIN
Low: right channel, High: left channel
Low: left channel, High: right channel
I/O voltage handling: I or O pins: –0.3 to +3.6V, except annotated pins: –0.3 to +5.5V
To prevent logic circuit latch-up, all power supply levels must be applied or removed simultaneously.
w
PP Rev 1.1 September 2003
4
Product Preview
WM8803
ABSOLUTE MAXIMUM RATINGS
Absolute Maximum Ratings are stress ratings only. Permanent damage to the device may be caused by continuously operating
beyond these limits. Device functional operating limits and guaranteed performance specifications are given under Ele
Characteristics at the test conditions specified.
ESD Sensitive Device. This device is manufactured on a CMOS process. It is therefore generically suscept
damage from excessive static voltages. Proper ESD precautions must be taken during handling and storage
device.
CONDITION
Maximum supply voltage
Maximum supply voltage
Input voltage 1
Input voltage 2
Storage temperature
Operating temperature
Maximum output current
Notes:
1.
2.
3.
4.
5.
AVDD pin
DVDD pin
XIN pin
RXIN, SDIN, PD, CE, CL, and DI pins
Per single input or output pin
SYMBOL
AVDD
max
DVDD
max
V
IN1
V
IN2
T
stg
T
opg
I
i
, I
o
CONDITIONS
1
2
3
4
MIN - MAX
–0.3 to 4.6V
–0.3 to 4.6V
–0.3 to VDD + 0.3V
–0.3 to 5.8V
–55 to 125°C
–30 to 70°C
5
±20 mA
RECOMMENDED OPERATING CONDITIONS
PARAMETER
Supply voltage 1
Supply voltage 2
Input voltage range 1
Input voltage range 2
Operating temperature
Notes:
1.
2.
3.
4.
PLLCK [1:0] = “00” or PLLCK [1:0] = “01”
PLLCK [1:0] = “10” or PLLCK [1:0] = “11”
XIN pin
RXIN, SDIN,
PD
, CE, CL, and DI pins
SYMBOL
AVDD, DVDD
AVDD, DVDD
V
IN1
V
IN2
T
opg
TEST CONDITIONS
1
2
3
4
MIN
2.7
3.0
0
0
–30
TYP
3.3
3.3
3.3
3.3
—
MAX
3.6
3.6
3.6
5.5
70
UNIT
V
V
V
V
°C
w
PP Rev 1.1 September 2003
5
Microchip MCU
京公网安备 11010802033920号
EEWORLD
