Appendix
Laser 1000/1500 Service Manual
Table A-7. CN8 Pin Assignment
Pin No.
Signal Name
Description
1
I
Switch interrupt
2
‘
—
Ground
3
LCDWRX
o
Write strobe to LCD
4
o
Clock to LCD
5
SWRDX
o
Read strobe to switch
6
LEDWRX
o
Write enable to LED
7
Data bus bit O
8
Al
o
Address bus bit 1
9
Data bus bit 2
10
Data bus bit 1
11
+5
—
+5
12
Data bus bit 3
13, 14
—
Ground
15-18
NC
—
Not connected
19
—
Ground
20
RESETX
o
Reset signal
21
—
Ground
22
NC
—
Not connected
23
—
Ground
24
HSYNCX
I
HSYNC for video I/F
25
EPRDYX
Engine controller ready
26
PRDYX
I
Print ready
27
TODX
I
Video request
28
ETBSYX
I
Engine controller busy
29
STSX
Status transfer
30
CMDX
o
Command transfer
31
CTBSYX
o
Video controller busy
32
o
Print signal
33
SRCLKX
o
Serial transfer clock
34
CPRDYX
o
Video controller ready
35
—
Ground
36
o
Video signal
37
—
Ground
38
NC
—
Ground
39
—
Ground
40
+5 v
—
+5
41
—
Ground
42
+5 v
—
+5
43
—
Ground
44
v
—
+5
45
—
Ground
46
+5 v
—
+5
47
—
Ground
48
v
—
+5
49
—
Ground
50
+5 v
—
+5
A-8
Rev. A
