— 7 —
CPU (LSI1: GT913F)
The 16-bit CPU contains a 1k-byte RAM, three 8-bit I/O ports, two timers, a key controller and serial interfaces.
The CPU detects key velocity by counting the time between first-key input signal FI and second-key SI from
the keyboard. The CPU reads sound data and velocity data from the sound source ROM in accordance with
the selected tone; the CPU can read rhythm data simultaneously when a rhythm pattern is selected. Then the
CPU provides 16-bit serial sound data to the DSP. The CPU also controls MIDI input/output and stores
sequencer data into the working storage RAM.
The following table shows the pin functions of LSI1.
.
o
N
n
i
P
l
a
n
i
m
r
e
T
t
u
O
/
n
I
n
o
i
t
c
n
u
F
1
0
D
X
T
t
u
O
d
e
s
u
t
o
N
2
0
D
X
R
n
I
d
e
s
u
t
o
N
3
0
K
C
S
t
u
O
t
u
p
t
u
o
l
a
n
g
i
s
)
f
f
O
r
e
w
o
P
o
t
u
A
(
O
P
A
4
1
D
X
T
t
u
O
t
u
p
t
u
o
l
a
n
g
i
s
I
D
I
M
5
1
D
X
R
n
I
t
u
p
n
i
l
a
n
g
i
s
I
D
I
M
6
1
K
C
S
t
u
O
t
u
p
t
u
o
e
s
l
u
p
g
n
i
z
i
n
o
r
h
c
n
y
s
Z
H
M
1
7
C
C
V
A
n
I
e
c
r
u
o
s
)
V
5
+
(
D
D
V
D
8
0
N
A
n
I
.
l
a
n
i
m
r
e
t
n
o
i
t
c
e
t
e
d
r
o
t
p
a
d
a
C
A
d
n
a
s
e
i
r
e
t
t
a
b
y
b
d
e
r
e
w
o
p
s
i
d
r
a
o
b
y
e
k
e
h
t
n
e
h
w
V
5
+
C
A
n
e
h
w
n
o
i
t
c
n
u
f
O
P
A
e
h
t
l
e
c
n
a
c
o
t
V
0
s
e
m
o
c
e
b
.
d
e
t
c
e
n
n
o
c
s
i
r
o
t
p
a
d
a
9
1
N
A
—
.
d
n
u
o
r
g
o
t
d
e
t
c
e
n
n
o
C
.
d
e
s
u
t
o
N
0
1
D
N
G
A
n
I
e
c
r
u
o
s
)
V
0
(
d
n
u
o
r
G
1
1
K
C
B
t
u
O
t
u
p
t
u
o
k
c
o
l
c
t
i
B
2
1
O
S
t
u
O
t
u
p
t
u
o
a
t
a
d
d
n
u
o
s
l
a
i
r
e
S
3
1
K
C
R
L
t
u
O
t
u
p
t
u
o
k
c
o
l
c
d
r
o
W
4
1
D
N
G
n
I
e
c
r
u
o
s
)
V
0
(
d
n
u
o
r
G
6
1
,
5
1
1
T
L
X
,
0
T
L
X
t
u
O
/
n
I
t
u
p
t
u
o
/
t
u
p
n
i
k
c
o
l
c
z
H
M
0
3
7
1
C
C
V
n
I
e
c
r
u
o
s
V
5
+
9
1
,
8
1
1
D
M
,
0
D
M
n
I
l
a
n
i
m
r
e
t
n
o
i
t
c
e
l
e
s
e
d
o
M
0
2
B
T
S
R
n
I
t
u
p
n
i
l
a
n
g
i
s
t
e
s
e
R
1
2
I
M
N
n
I
t
u
p
n
i
l
a
n
g
i
s
N
O
r
e
w
o
P
2
2
0
1
P
/
T
N
I
t
u
O
/
n
I
r
e
v
i
r
d
D
C
L
e
h
t
r
o
f
s
u
b
a
t
a
D
0
3
~
3
2
3
I
F
~
0
I
F
3
I
S
~
0
I
S
n
I
l
a
n
g
i
s
t
u
p
n
i
y
e
k
r
o
f
l
a
n
i
m
r
e
T
8
3
~
1
3
7
C
K
~
0
C
K
t
u
O
l
a
n
g
i
s
n
a
c
s
y
e
k
r
o
f
l
a
n
i
m
r
e
T
6
4
~
9
3
7
I
F
~
4
I
F
7
I
S
~
4
I
S
n
I
l
a
n
g
i
s
t
u
p
n
i
y
e
k
r
o
f
l
a
n
i
m
r
e
T
8
4
,
7
4
8
I
S
,
8
I
F
—
d
e
s
u
t
o
N
9
4
9
I
F
n
I
l
a
n
g
i
s
t
u
p
n
i
n
o
t
t
u
b
r
o
f
l
a
n
i
m
r
e
T
0
5
9
I
S
n
I
r
e
v
i
r
d
D
C
L
r
o
f
s
u
b
a
t
a
D
1
5
0
1
I
F
n
I
l
a
n
g
i
s
t
u
p
n
i
n
o
t
t
u
b
r
o
f
l
a
n
i
m
r
e
T
2
5
3
2
P
/
0
1
I
S
t
u
O
r
e
v
i
r
d
D
C
L
e
h
t
r
o
f
s
u
b
a
t
a
D
5
5
~
3
5
2
I
K
~
0
I
K
n
I
l
a
n
g
i
s
t
u
p
n
i
n
o
t
t
u
b
r
o
f
l
a
n
i
m
r
e
T
6
5
B
N
W
M
t
u
O
P
S
D
e
h
t
r
o
f
l
a
n
g
i
s
e
l
b
a
n
e
e
t
i
r
W
Содержание CTK-620L
Страница 16: ...15 SCHEMATIC DIAGRAMS Main PCB JCM447 MA1M AT 49 30M 4 11 1 12 7 8 3 5 6 2 10 9...
Страница 17: ...16 Sub PCB JCM447 MA2M 5 6 V 5 6 V 5 6 V 0 7 V 2 V 50V 1...
Страница 18: ...17 Console PCB JCM447 CN1M...
Страница 19: ...18 Console PCB JCM447 CN2M...
Страница 20: ...19 Display PCB JCM447 LCD1M...
Страница 21: ...20 Keyboard PCBs JCM618T KY1M KY2M...
Страница 22: ...21 LED PCB JCM447 LD1M...
Страница 23: ...22 LED PCB JCM447 LD2M...
Страница 24: ...23 LED PCB JCM447 LD6...
Страница 25: ...24 Console PCBs JCM447 CN3M CN4M...
Страница 26: ...25 Console PCB JCM447 CN5M...
Страница 27: ...26 LED PCBs JCM447 LD4M LD5M...
Страница 28: ...27 LED PCB JCM447 LD3M...
