YMF754-V ETC, YMF754-V Datasheet - Page 41
YMF754-V
Manufacturer Part Number
YMF754-V
Description
DS-1E
Manufacturer
ETC
Datasheet
1.YMF754-V.pdf
(60 pages)
- Current page: 41 of 60
- Download datasheet (306Kb)
YMF754
b7................FFEMP: FM Synthesizer Empty
This bit indicates whether or not FIFO followed by the FM Synthesizer is empty.
“0”: not Empty
“1”: Empty
i) Scan Out
Suspend Preparation
Scan Data (Read)
N = 34 byte (Total Scan Data = 268 bit (33 byte x 8 + 4 bit))
SBPDA=0
SBPDR=1
SBPDA=1
SE=1 -> 0
SM=1
SS=1
(default)
: not ready for scanning
:
: ready for scanning
: internal state read out
: reading internal state
inhibit further DMA,
internal state data
internal state shutdown
internal state data
: shifting internal state
scan data out 1-bit at a time
: internal state
scan data out
8 times
N times
-41-
ii) Scan In
Resume Completion
Scan Data (Write)
SBPDA=0
SBPDA=1
SBPDR=1
SBPDR=0
SE=1 -> 0
SM=0
SM=0
SS=1
SS=0
: not ready for scanning
: inhibit further DMA,
: ready for scanning
:
: writing internal state
internal state data
internal state shutdown
internal state data
internal state write in
:
scan data in
:
scan data in 1-bit at a time
internal state
shifting internal state
8 times
N times
June 28, 1999
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