YMF715E Datasheet, PDF (38/54 Pages) YAMAHA CORPORATION – OPL3 Single-chip Audio System 3

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Sound Blaster compatibility Internal State Scan out/in (R/W):
Index
D7
D6
D5
D4
D3
D2
D1
D0
10h SBPDA
-
-
-
SS
SM
SE SBPDR
SBPDA...
Sound Blaster Power Down Acknowledgment: “1” in SBPDA acknowledges
that OPL3-SA3 is ready for scanning internal state data in/out or for power
down operation. This flag is read-only.
SS...
SM...
Scan Select : Set “1” in this bit when reading or writing internal state.
Set “0” for normal operation.
Scan Mode : Setting “1” in this bit means the internal state’s are read(out).
Set “0” for write(in).
SE...
Scan Enable : “1” to “0” transition in this bit clocks the shifting internal state
scan data out 1-bit at a time.
SBPDR...
Sound Blaster Power Down Request : “1” in this bit inhibits further DMA
requests and have the internal state begin shutdown procedure. “1” in
SBPDA signals the shutdown procedure completion.
default : 00h
Sound Blaster compatibility Internal State Scan Data (R/W):
Index
D7
D6
D5
D4
D3
D2
D1
D0
11h
SCAN DATA
SCAN DATA... Data port for internal state scan data in/out.
default : 00h
Notice)
The Sound Blaster compatibility internal state scan out/in sequence are shown in the
following Fig.9-1.
May 21, 1997
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