Fujitsu MB90390 Series, Руководство по оборудованию

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CHAPTER 25 SOUND GENERATOR
25.2 Sound Generator Registers
The sound generator has the following five types of registers:
• Sound control register (SGCR)
• Frequency data register (SGFR)
• Amplitude data register (SGAR)
• Decrement grade register (SGDR)
• Tone count register (SGTR)
■
Sound Generator Registers
Figure 25.2-1 Overview on the Sound Generator Registers
Initi a l v a l u e
0 0 0 0 0 0 0 0
B
R/W R/W R/W R/W R/W R/W R/W R/W
Addre ss :
H
00005E
S GCR (lower)
7 6 5 4 3 2 1 0
Initi a l v a l u e
0 X X X X X 0 0
B
S GCR ( u pper)
R/ W R R/W
H
00005F
15 14 1 3 12 11 10 9 8
Initi a l v a l u e
X X X X X X X X
B
R/W R/W R/W R/W R/W R/W R/W R/W
H
00 3 546
S GFR
Initi a l v a l u e
X X X X X X X X
B
S GAR
R/W R/W R/W R/W R/W R/W R/W R/W
H
00 3 547
7 b it
b it
b it
b it
b it
b it
6 5 4 3 2 1 0
D7 D6 D5 D4 D 3 D2 D1 D0
S 1 S 0 TONE OE2 OE1 INTE INT S T
Re s erved - - - -
BU S Y DEC
-
- - - - -
15 14 1 3 12 11 10 9 8
D7 D6 D5 D4 D 3 D2 D1 D0
7 6 5 4 3 2 1 0
Initi a l v a l u e
X X X X X X X X
B
R/W R/W R/W R/W R/W R/W R/W R/W
H
00 3 54 8
S GDR
Initi a l v a l u e
X X X X X X X X
B
S GTR
R/W R/W R/W R/W R/W R/W R/W R/W
H
00 3 549
D7 D6 D5 D4 D 3 D2 D1 D0
15 14 1 3 12 11 10 9 8
D7 D6 D5 D4 D 3 D2 D1 D0
X : Undefined v a l u e
- : Undefined
R/W : Re a d ab le a nd writ ab le