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YMF715E
May 21, 1997
-39-
i) Scan Out
SBPDA=0
SBPDR=1
SBPDA=1
SM=1
SS=1
SE=1 0
: not ready for scanning
internal state data
: inhibit further DMA,
internal state shutdown
: ready for scanning
internal state data
: internal state read out
: reading internal state
: shifting internal state
scan data out 1-bit at a time
8 times
N times
: internal state
scan data out
Scan Data (Read)
Suspend Prepareration
N=29 byte (Total Scan Data=228 bit (28 byte 8+4bit))
Fig. 9-1 Sound Blaster compatibility Internal State Scan out/in Sequence
ii) Scan In
SBPDA=0
SBPDR=1
SBPDA=1
SM=0
SS=1
SE=1 0
: not ready for scanning
internal state data
: inhibit further DMA,
internal state shutdown
: ready for scanning
internal state data
: internal state write in
: writing internal state
: shifting internal state
scan data in 1-bit at a time
8 times
N times
: internal state
scan data in
Scan Data (Write)
Resume Completion
SM=0
SS=0
SBPDR=0