ad1848 Analog Devices, Inc., ad1848 Datasheet - Page 23

• Manufacturer Part Number: ad1848
• Description: Parallel-port 16-bit Soundport Stereo Codec
• Manufacturer: Analog Devices, Inc.

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CDRQ OUTPUT
Figure 13. AD1848K 8-Bit Mono DMA Read/Capture Cycle
DBEN & DBDIR
CDAK INPUT
OUTPUTS
OUTPUTS
RD INPUT
DATA7:0
ISA BUS
BCLK
CDRQ/ PDRQ
CDAK/ PDAK
RD OR WR
OUTPUTS
DATA7:0
t
ISA BUS
DKSU
INPUTS
INPUTS
BCLK
t
RDDV
Figure 15. AD1848K 8-Bit Stereo or 16-Bit Mono DMA Cycle
t
RD OR WR
DRHD
OUTPUTS
t
DATA7:0
DBDL
ISA BUS
t
INPUTS
STW
INPUTS
CDRQ/
CDAK/
PDRQ
BCLK
PDAK
Figure 16. AD1848K 16-Bit Stereo DMA Cycle
BYTE
LOW
t
DKHDB
LEFT SAMPLE
t
DHD1
t
BWDN
LEFT/LOW
BYTE
–23–
HIGH
BYTE
t
BWDN
Figure 14. AD1848K 8-Bit Mono DMA Write/Playback Cycle
OUTPUTS
WR INPUT
DATA7:0
ISA BUS
OUTPUT
OUTPUT
INPUTS
DBDIR
INPUT
DBEN
BCLK
PDRQ
PDAK
RIGHT/HIGH
BYTE
HI
BYTE
LOW
RIGHT SAMPLE
t
DKSU
BYTE
HIGH
t
DRHD
t
t
DBDL
t
WDSU
STW
AD1848K
t
DKHDA
t
DHD2