Sharp FO-70 Service Manual page 82

FO-50RA
FO-70RA
IC3: VHiW24258S7LE (W24258S-70LE)
(TOP VIEW)
A14 1 28 VDD
A12 2 27 WE
A7 3 26 A13
A6 4 25 A8
A5 5 24 A9
A4 6 23 A11
A3 7 22 OE
A2 8 21 A10
A1 9 20 CS
A0 10 19 I/O8
I/O1 11 18 I/O7
I/O2 12 17 I/O6
I/O3 13 16 I/O5
15 I/O4
VSS 14
IC1: VHiTC7WT74FU1 (TC7WT74)
CK 1
D 2
Q 3
GND 4
IC8: VHiULN2003AN/ (ULN2003ANS)
1C 2C 3C 4C 5C 6C 7C COM
16 15 14 13 12 11 10
1 2 3
1B 2B 3B 4B 5B 6B 7B
Pin name Signal
Address input
A0~A14
CS Chip select input
WE Write enable input
OE Output enable input
I/O1~I/O8 Data I/O
VDD Power source
VSS Ground
8 VCC
7 PR
6 CLR
5 Q
9
4 5 6 7 8
E
IC5: VHi27C1000PC5 (27C010)
ROM
(TOP VIEW)
VPP 1 32 VCC
A16 2 31 PGM
A15 3 30 A17
A12 4 29 A14
A7 5 28 A13
A6 6 27 A8
A5 7 26 A9
A4 8 25 A11
A3 9 24 G
A2 10 23 A10
A1 11 22 E
A0 12 21 DQ8
DQ1 13 20 DQ7
DQ2 14 19 DQ6
DQ3 15 18 DQ5
GND 16 17 DQ4
IC6: VHiNJM2113M-1 (NJM2113M)
CD 1
FC2 2
FC1 3
VIN 4
(TOP VIEW)
8 – 5
Pin name
Signal
A0~A17 Address input
E
Chip enable
G Output enable
GND
Ground
PGM Program
DQ1~DQ8 Data output (Program input)
VCC +5V power
VPP +12.5V power(*)
(*) Only in the program mode
8 VO2
7 GND
6 VCC
5 VO1