Epson LQ-2550 Technical Manual page 285

Signal
Pin No.
ERROR
PE
2
D6 (B4)
3
BUSY
4
5 D5 (B3)
ACKNLG
6
7 D4 (Par-dis)
INIT
8
D3 (0/E)
9
10 STROBE
D7 (RXD)
11
12
13 RESET
– 1 2
14
15 D2 (B2)
+ 5
16
17
18 NC
19
+ 1 2
20
21
—
22
23 SLCT IN
24
25 TXD
2 6
NOTE: The parenthesized descriptions in the "signal'" column are for the 8143 interface board.
Table A-1 9. CN2
Pin Assignments
Error
o
o Paper end
Data bit 6
I
BUSY (READY)
o
Data bit 5
o Acknowledge
Data bit 4 (Parity disable)
I
I Initialize
I Data bit 3 (Odd/Even parity select)
Strobe pulse
Data bit 7 (Serial signal input)
—
Signal GND
Reset
o
– 12V DC
o
I Data bit 2 (Bit rate select)
o
I Data bit 1 (Bit rate select)
—
Not connected
I Data bit O (8-bit/7-bit select)
+ 12V DC
o
I Parallel/Serial select
— —
I Select in
—
Signal GND
o
Transit data
—
Signal GND
A-40
Description