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PDF WM8802 Data sheet ( Hoja de datos )
| Número de pieza | WM8802 | |
| Descripción | Digital Audio Interface Transceiver | |
| Fabricantes | Wolfson Microelectronics | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de WM8802 (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
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WM8802
Digital Audio Interface Transceiver
DESCRIPTION
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.
Data can be demodulated using the on-board PLL or with
the use of an external clock source.
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.
The device is available in a small 48-pin SQFP package.
FEATURES
• PLL circuit for synchronization with transferred input bi-
phase mark signal.
• 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
• Master or Slave Clocking Mode
• Programmable Audio Data Interface Modes
− I2S, Left, Right Justified
− 16/20/24/32 bit Word Lengths
• 3.3V Digital supply Operation
• 5V tolerant digital input ports
APPLICATIONS
• DVD Receivers
• AV Amplifiers
• DVD Recorders
BLOCK DIAGRAM
RXOUT
RX0
RX1
RX2
RX3
RX4
RX5/VI
RX6/UI
EMPH/UO AUDIO/VO
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WM8802
CBIT, UBIT
INPUT
SELECTOR
DEMODULATION
AND
LOCK DETECT
INT CL CE DI XMODE
MICROCONTROLLER
I/F
DATA
SELECTOR
DO
RERR
RDATA
SDIN
LPF
TMCLK/GPIO0
TBCLK/GPIO1
TLRCLK/GPIO2
TDATA/GPIO3
MODULATION
AND
PARALLEL PORT
PLL
CLOCK
SELECTOR
1/N
RMCK
RBCK
RLRCK
SBCK
SLRCK
TXO/GPIOEN
WOLFSON MICROELECTRONICS plc
w :: www.wolfsonmicro.com
XIN XOUT XMCLK CKST
Product Preview, April 2004, Rev 1.1
Copyright 2004 Wolfson Microelectronics plc
1 page  
Product Preview
WM8802
PIN NAME
TYPE
DESCRIPTION
45 TBCK/GPIO1 Digital Input/Output Modulation 64fs bit clock input. General-purpose I/O input/output pin.
46 TLRCK/GPIO2 Digital Input/Output Modulation fs clock input. General-purpose I/O input/output pin.
47 TDATA/GPIO3 Digital Input/Output Modulation serial audio data input. General-purpose I/O input/output pin.
48 TXO/GPIOEN Digital Output/Input Modulation data output. General-purpose I/O enable input pin.
Notes:
1. Input/output I or O = −0.3 to 3.6V, except annotated pins: −0.3 to +5.5V
2. Pins 32 and 33 are latch address setting input pins when pin 41 = Low.
3. Pin 34 is the demodulation function master or slave setting input pin when pin 41 = Low.
4. Pin 35 is the modulation function or general-purpose I/O function switch setting input pin when pin 41 = Low.
5. Perform ON/OFF for all power supplies with the same timing as a latch-up countermeasure.
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PP Rev 1.1 April 2004
5
5 Page 
Product Preview
WM8802
CHIP ADDRESS SETTINGS (EMPHA/UO, AUDIO /VO)
The WM8802 comes with a function to set a unique chip address to allow the use of several
WM8802 on the same micro-controller bus.
A 10kΩ pull-down or pull-up resistor is used to set EMPHA/UO and AUDIO /VO as the chip address
settings. This allows up to set 4 chip addresses.
Chip addresses in the micro-controller interface can be set with CAL and CAU provided that they are
first two bits on the LSB side. CAL and CAU corresponds to the lower and higher chip address
respectively.
Address writing to a particular device is enabled by making the chip address setting, using
EMPHA/UO and AUDIO /VO, the same as the chip addresses sent from the micro-controller.
The chip address setting must be performed even when using only one WM8802 in the system. The
chip address is undefined and control from the micro-controller cannot be performed if the chip
address setting is not performed. While XMODE is Low and the micro-controller is not used the state
of the chip address setting pin is undefined,. Be sure to connect either A pull-down resistor or a pull-
up resistor should be connected to EMPHA/UO and AUDIO /VO.
AUDIO /VO
EMPHA/UO
Pull-down
Pull-down
Pull-down
Pull-up
Pull-up
Pull-down
Pull-up
Pull-up
Table 2 Chipset Address Settings
CAU
0
0
1
1
CAL
0
1
0
1
WM8802
EMPH/UO
AUDIO/VO
CKST
INT
Pull-up 10kΩ
External
Circuit
Pull-down 10kΩ
Figure 4 Function Setting Input Pin Setting Example
Notes:
1. Chip address setting
=> CAL = CAU = 0
2. Demodulation function master or slave setting
=> Master
3. Modulation function or general purpose I/O port switch => General purpose I/O port
function
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PP Rev 1.1 April 2004
11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet WM8802.PDF ] | |
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