ad1843jst Analog Devices, Inc., ad1843jst Datasheet - Page 17

• Manufacturer Part Number: ad1843jst
• Description: Serial-port 16-bit Soundcomm Codec
• Manufacturer: Analog Devices, Inc.

REV. 0
SDI OR SDO
SDI OR SDO
SCLK
SCLK
SDFS
SDFS
EXTERNAL MPEG
AUDIO FROM
DECODER
3
3
2
2
1
1
PSTN
SYNTHESIZER
AUDIO FROM
0
0
WAVEFORM
EXTERNAL
AUDIO FROM DAT
MSB
MSB
15 14 13 12
15 14 13 12
SLOT 0
SLOT 0
CD-ROM
OR CASSETTE
DAA
PC SPEAKER
SAMPLE PERIOD N
SAMPLE PERIOD N
FRAME M
256 BITS
256 BITS
SPEAKERPHONE
FRS = 0
Figure 7. FRS = 0, Master Mode Timing
Figure 8. FRS = 1, Master Mode Timing
NOTE THAT AD1843 FRAME RATE IS NOT RELATED TO SAMPLE RATES
3
3
“BEEPER” SIGNAL
Figure 6. Typical Configurations
NOTE THAT SCLK CAN BE PROGRAMMED FOR EITHER 12.288 MHz
PC ATTENTION
FRS = 1
2
2
SLOT 15
SLOT 15
[DEFAULT 32 SLOTS PER FRAME, 2 SAMPLES PER FRAME SYNC]
1
1
FRAME M
512 BITS
0
0
[16 SLOTS PER FRAME, 1 SAMPLE PER FRAME SYNC]
MSB
MSB
OR 16.384 MHz WHEN IN MASTER MODE
15 14 13 12
15 14 13 12
LINE IN
MIC IN RIGHT
MIC IN LEFT
AUX1 IN
AUX2 IN
AUX3 IN
MONO IN
SUM IN
LINE1 OUT
HEADPHONE OUT
LINE2 OUT RIGHT
LINE2 OUT LEFT
MONO OUT
SLOT 0
SLOT 16
AD1843 SOUNDCOMM
MULTIMEDIA SPEAKERS
SAMPLE PERIOD N+1
SAMPLE PERIOD N+1
EXTERNAL POWERED
–17–
MASTER MODE
FRAME M+1
CODEC
MASTER MODE
256 BITS
256 BITS
INTERFACE
3
3
SERIAL
CONV1
SYNC2
BIT1
2
2
SLOT 15
SLOT 31
1
1
0
0
MSB
MSB
15 14 13 12
15 14 13 12
SLOT 0
SLOT 0
SYNC SIGNAL
HORIZONTAL
SAMPLE PERIOD N+2
SAMPLE PERIOD N+2
NTSC
SERIAL
INTERFACE
FRAME M+2
DSP OR ASIC
ADSP-21xx
OR PARALLEL
256 BITS
256 BITS
IDMA PORT
PORT
3
3
FRAME M+1
2
2
SLOT 15
SLOT 15
1
1
512 BITS
0
0
MSB
MSB
SAMPLE
PERIOD N+3
ISA OR PCI
SAMPLE
PERIOD N+3
SLOT 16
SLOT 0
HOST BUS
15 14 13 12
15 14 13 12
FRAME M+3
AD1843
256 BITS