Sharp FO-4500, Service Manual

Page: 154 / 192

IC1, 5: VHi27C04010Ti (27C040)
1
2
3
4
5
6
7
8
9
10
11
12
13
VPP
A16
A15
A12
A7
A6
A5
A4
A3
A2
A1
A0
DQ1
32
31
30
29
28
27
26
25
24
23
22
21
20
VCC
PGM
NC
A14
A13
A8
A9
A11
G
A10
E
DQ8
DQ7
14
15
16
DQ2
DQ3
GND
DQ6
DQ5
DQ4
19
18
17
(TOP VIEW)
Pin name
A0~A17
E
G
GND
PGM
DQ1~DQ8
VCC
VPP
Signal
Address input
Chip enable
Output enable
Ground
Program
Data output (Program input)
+5V power
+12.5V power(*)
(*) Only in the program mode
IC3, 8: VHiM5255CF70L (M5M5255CFP-70LL)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
N.C
N.C
A14
A12
A7
A6
A5
A4
A3
A2
A1
A0
I/O1
I/O2
I/O3
GND
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17 I/O4
I/O5
I/O6
I/O7
I/O8
CE1
A10
OE
A11
A9
A8
A13
WE
CE2
A15
VCC
(TOP VIEW)
Pin name
A0 ~A15
I/O1 ~ I/O8
CE1, CE2
WE
OE
VCC
GND
N.C
Signal
Address input
Data input/output
Chip enable1, 2 input
Write enable input
Output enable input
+5V power
Ground
Non connection
IC105: VHiNJU4051M-1 (NJU4051BM)
6
11
10
9
13
14
15
12
Inhibit
Controls
15 Common
Out/In
1
Switches
In/Out
5
A
B
C
X0
X1
X2
X3
X4
X5
X
VDD: Pin 16
VSS: Pin 8
VEE: Pin7
2 X6
4 X7
IC114, 117: VHiMC74HC74F- (MC74HC74AF)
INPUT
Q
CLR
PR
CK
D
Q
Q
CK
Q
PR
CLR
D
VCC
2 CLR
2D
2CK
2PR
2Q
2Q
GND
1 CLR
1D
1CK
1PR
1Q
1Q
D
X
X
X
H
L
X
OUTPUT
Q
H
L
H*
H
L
Q
Q
H*
L
H
L
CLK
X
X
X
R
H
L
L
H
H
H
L
H
PR
L
H
H
H NO Change
H:High L:Low X:H or L
1 2 3 4 5 6 7
9 10 11 12 13 14 8
FO-4500H
8 – 11