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P
n i
N
. o
T
r e
m
n i
l a
8
0
V
C
C
8
1
G
N
D
8
2
M
R
D
B
8
3
~
9
8
M
D
0
~
M
D
9
9
P
L
E
1
0
0
P
1
7
DIGITAL SIGNAL PROCESSOR (LSI2: HG51B227FB-1)
The DSP receives 16-bit serial sound data output from the CPU and adds the selected effect to the sound data
using the effect RAM. Then the DSP provides the sound data to the DAC. The DSP also controls button input/
output.
The following table shows the pin functions of LSI2.
P
n i
N
. o
T
r e
1
~
, 3
8
0
P
B
4
5
6
W
7
V
8
T
9
R
1
0
V
1
, 1
1
2
I X
, N
1
3
W
1
4
1
5
1
6
1
7
V
1
8
~
2
5
I
O
2
6
R
2
7
V
2
8
2
9
3
0
3
1
V
3
2
3
3
3
4
C
3
5
~
4
, 1
4
3
I E
O
4
2
,
4
, 4
4
6
~
4
, 8
E
A
0
5
1
~
5
, 9
6
1
4
5
E
I
/ n
O
t u
n I
+
5
V
s
o
u
n I
G
o r
u
n
d
0 (
O
t u
R
e
a
d
e
n
a
1
5
I
/ n
O
t u
D
a
a t
b
u
s
O
t u
R
e
s
t e
s
g i
I
/ n
O
t u
D
a
a t
b
u
s
m
n i
l a
I
/ n
O
t u
0
~
P
B
3
n I
B
t u
o t
P
B
4
n I
A
S
I S
S
O
O
t u
S
r e
a i
C
K
O
O
t u
W
o
d r
D
D
3
n I
+
5
V
E
S
T
—
N
t o
E
S
B
n I
R
e
s
S
S
2
n I
G
o r
u
X
O
U
T
I
/ n
O
t u
2
0
M
C
I K
n I
W
o
d r
I S
n I
S
r e
a i
B
C
I K
n I
B
t i
c
S
N I
C
n I
1
M
H
D
D
2
n I
+
5
V
0
~
I
O
7
I
/ n
O
t u
D
a
a t
C
E
B
O
t u
C
h
p i
S
S
3
n I
G
o r
u
A
D
1
n I
A
d
d
O
E
B
O
t u
O
u
p t
W
E
B
n I
W
i r
e t
D
D
3
n I
+
5
V
C
E
2
n I
C
h
p i
A
D
0
n I
A
d
d
E
1
B
n I
C
h
p i
0
~
I E
O
7
I
/ n
O
t u
D
a
a t
~
E
A
1
2
O
t u
A
d
d
C
E
B
O
t u
C
h
p i
F
u
n
t c
c r
e
) V
s
o
u
c r
e
b
e l
s
g i
n
l a
o
u
p t
u
f t
r o
h t
e
s
n
l a
o
u
p t
u
f t
r o
h t
e
D
S
P
f
r o
h t
e
L
C
D
r d
v i
r e
F
u
n
n i
p
u
t t
r e
m
n i
a
s l
G
N
A
B
L
E
J
a
k c
n i
p
t u
s l
o
u
n
d
d
a
a t
o
u
p t
u
f t
r o
h t
c
o l
k c
o
u
p t
u
f t
r o
h t
e
D
A
C
s
o
u
c r
e
u
s
e
d
t e
s
g i
n
l a
n i
p
t u
n
d
0 (
) V
s
o
u
c r
e
H
z
c
o l
k c
n i
p
t u
o /
u
p t
t u
c
o l
k c
n i
p
u
f t
o r
m
h t
e
C
P
U
s l
o
u
n
d
d
a
a t
n i
p
u
f t
o r
m
h t
o l
k c
n i
p
u
f t
o r
m
h t
e
C
P
U
z
y s
n
c
h
o r
n
z i
n i
g
p
u
s l
e
n i
p
s
o
u
c r
e
b
u
s
e
n
a
b
e l
s
g i
n
l a
o
u
p t
u
f t
r o
h t
n
d
0 (
) V
s
o
u
c r
e
e r
s s
b
u
s
t u
e
n
a
b
e l
s
g i
n
a
f l
r o
w
o
k r
n i
e
n
a
b
e l
s
g i
n
l a
s
o
u
c r
e
e
n
a
b
e l
s
g i
n
l a
n i
p
u
. t
H
g i
h
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s s
b
u
s
e
n
a
b
e l
s
g i
n
l a
n i
p
u
. t
L
o
w
b
u
s
f
r o
h t
e
f e
e f
t c
R
A
M
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b
u
s
f
r o
h t
e
f e
e f
t c
R
A
M
e
n
a
b
e l
s
g i
n
l a
o
u
p t
u
f t
r o
h t
— 7 —
o i
n
o
u
n
d
s
o
u
c r
e
R
O
M
n
t c
o i
n
e
D
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e
C
P
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t u
e
w
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k r
n i
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c
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v i t
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R
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