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Número de pieza

componentes Descripción

fabricante

AD1843

Serial-Port 16-Bit SoundComm Codec

Analog Devices 

AD1843

EXTERNAL

WAVEFORM

SYNTHESIZER

AUDIO FROM

EXTERNAL MPEG

DECODER

AUDIO FROM

CD-ROM

DAA

PSTN

PC SPEAKER

PC ATTENTION

“BEEPER” SIGNAL

AD1843 SOUNDCOMM

CODEC

LINE IN

SYNC2

MIC IN RIGHT

MIC IN LEFT

CONV1

AUX1 IN

AUX2 IN

BIT1

AUX3 IN

MONO IN

SUM IN

LINE1 OUT

SERIAL

INTERFACE

HEADPHONE OUT

LINE2 OUT RIGHT

LINE2 OUT LEFT

MONO OUT

AUDIO FROM DAT

OR CASSETTE

SPEAKERPHONE

EXTERNAL POWERED

MULTIMEDIA SPEAKERS

NTSC

HORIZONTAL

SYNC SIGNAL

ADSP-21xx

DSP OR ASIC

SERIAL

INTERFACE

IDMA PORT

OR PARALLEL

PORT

HOST BUS

ISA OR PCI

Figure 6. Typical Configurations

SDI OR SDO

SCLK

SDFS

SAMPLE PERIOD N

SLOT 0

SLOT 15

256 BITS

SAMPLE PERIOD N+1

SLOT 16

SLOT 31

256 BITS

SAMPLE

PERIOD N+3

SAMPLE PERIOD N+2

SLOT 16

SLOT 0

SLOT 15

256 BITS

256 BITS

3 2 1 0 15 14 13 12

MSB

3 2 1 0 15 14 13 12

MSB

3 2 1 0 15 14 13 12

MSB

3 2 1 0 15 14 13 12

MSB

512 BITS

FRAME M

FRS = 0 [DEFAULT 32 SLOTS PER FRAME, 2 SAMPLES PER FRAME SYNC]

MASTER MODE

NOTE THAT AD1843 FRAME RATE IS NOT RELATED TO SAMPLE RATES

512 BITS

FRAME M+1

Figure 7. FRS = 0, Master Mode Timing

SAMPLE PERIOD N

SLOT 0

SLOT 15

SAMPLE PERIOD N+1

SLOT 0

SLOT 15

SAMPLE

PERIOD N+3

SAMPLE PERIOD N+2

SLOT 0

SLOT 0

SLOT 15

SDI OR SDO

SCLK

SDFS

3 2 1 0 15 14 13 12

MSB

3 2 1 0 15 14 13 12

MSB

3 2 1 0 15 14 13 12

MSB

3 2 1 0 15 14 13 12

MSB

256 BITS

FRAME M

256 BITS

FRAME M+1

256 BITS

FRAME M+2

FRS = 1 [16 SLOTS PER FRAME, 1 SAMPLE PER FRAME SYNC]

MASTER MODE

NOTE THAT SCLK CAN BE PROGRAMMED FOR EITHER 12.288 MHz

OR 16.384 MHz WHEN IN MASTER MODE

Figure 8. FRS = 1, Master Mode Timing

FRAME M+3

REV. 0

–17–

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