Akai PD-X4440R, Service Manual

Page: 13 / 16

23 24
IC401 HY57V16160DTC/W981616BH-7
Self Refresh Counter
Interval Timer
Refresh
Refresh
Counter
R
o
w
A
d
d
r.
L
a
tc
h
/P
re
d
e
c
o
d
e
R
o
w
A
d
d
r.
L
a
tc
h
/P
re
d
e
c
o
d
e
R
o
w
D
e
c
o
d
e
r
R
o
w
D
e
c
o
d
e
r
Sense AMP & I/O gates
Sense AMP & I/O gates
Column Decoder
Column Decoder
512Kx16
512Kx16
Bank 0
Bank 1
Column Addr
Latch & Counter
Address
Register
Burst Length
Counter
C
A
(0
7
)
C
A
(0
7
)
D
a
ta
In
p
u
t/
O
u
tp
u
t
B
u
ff
e
rs
DQ0
DQ1
DQ2
DQ3
DQ4
DQ5
DQ6
DQ7
DQ8
DQ9
DQ10
DQ11
DQ12
DQ13
DQ14
DQ15
I/O Control Test Mode
Mode Register
S
ta
te
M
a
c
h
in
e
CLK
CKE
BA(ALL)
UDOM
LDOM
RAS
CAS
WE
CS
A
u
to
/S
e
lf
R
e
fr
e
s
h
R
e
f
A
d
d
r
(0
:1
1
)
Address (0 10)
Column Active
Overflow
O
P
C
O
D
E
M
o
d
e
R
e
g
is
te
r
S
e
t
B
u
rs
t
L
e
n
g
th
T
y
p
e
Precharge
Row Active
R
e
a
d
/W
ri
te
/O
P
M
a
s
s
BLOCK DIAGRAM
IC
1
0
1
B
U
9
5
3
4
K
V
1
3
1
2
6
V
R
S
L
E
D
+
P
D
S
L
E
D
-
L
D
L
IM
S
W
S
P
IN
D
+
G
N
D
L
IM
S
W
S
P
IN
D
-
F
V
C
C
V
C E C A D B T- F+ T+ F
-
4 5 2 3
Q
1
0
1
R
F
-S
V
C
C
C
N
1
0
1
C
N
1
0
2
1
9
2
0
2
1
2
3
2
4
2
6
2
7
8
2
8
0
IC
4
0
1
1
6
M
S
D
R
A
M
V
R
3
0
1
A
M
P
IC
3
0
1
B
H
4
4
5
3
F
3
1
5
7
H
P
J
A
C
K
J
3
0
2
IC
6
0
1
B
H
6
5
7
5
2
2
2
3
2
4
2
5
3
1
3
7
2
0
1
9
1
8
1
7
6
1
0
9 8 7 4 3 2 1
5
2
5
3
5
5
5
6
5
8
6
1
6
2
6
3
6
4
2
3
5
9
1
1
1
2
1
3
1
4
1
5
4
7
4
6
3
5
L
C
D
5
0
1
K
E
Y
(S
W
5
0
1
-
S
W
5
0
7
)
Q
6
0
5
Q
6
0
1
L
6
0
4
L
6
0
1
Q
6
0
3
S
V
C
C
1
2
3
Q
6
0
2
B
A
T
T
+
J6
0
1
C
N
5
0
1
C
N
5
0
2
C
P
U
IC
5
0
1
B
U
2
4
5
9
0
-8
W