Epson LQ-2550 Technical Manual page 262

Pin
Name
No.
51
BANK 1
43
18
17
15 OE
55
AB 1
5 0
54
53
45
24
44
48
58
3 8
10 AB 10
9 AB 11
AB 12
39
4 0 AB 13
8 AB 14
AB 15
7
59
AB 17
28
29 AB 18
56
57
49 D2
D3
37
D4
D5
D7
POTO
POT I
2 6 C S B 4 0
3
CSBCO
6 0
CSBDO
4 2
CSBEO
25
CSBFO
Table A-8. EO5A1OAA Terminal Functions
Description
Bank select O
o
0 Bank select 1
Bank select 2
o
Bank select 3
o
Output enable
o
Address bus O
I Address bus 1
I Address bus 2
I Enable signal
I Memory enable signal
I Address bus 5
Address bus 6
Address bus 7
I Address bus 8
Address bus 9
I Address bus 10
I Address bus 11
I Address bus 12
I Address bus 13
Address bus 14
I Address bus 15
Address bus 16
I
I Address bus 17
I Address bus 18
Data bus O
Data bus 1
Data bus 2
Data bus 3
Data bus 4
Data bus 5
Data bus 6
Data bus 7
o
Port 1
o
Port 2
0
Memory mapped 1/0 O
Memory mapped 1/0 1
o
o Memory mapped 1/0 2
o Memory mapped 1/0 3
Chip
-
0 '
select bank
o
Chip
select bank
o
select
bank COH
o select bank
Chip
o
Chip select bank
o
select bank
Not used
Not used
-.
OOH "–
40H
DOH
E O H
IC (1 OA: CS,
FOH
A-1 7
Notes
3 4 )
pin
2A: C–E,
pin 22) C.G.
CE 22) C.G.
pin
pin 18)
pin 20)