Specifications
6-4
6.3 Parallel Interface - Centronics
This is an unidirectional interface that transfers 1 byte at a time.
Signal Name
Description
Pin in
Pin out
Source
D STROBE
CE DATA 1
CE DATA 2
CE DATA 3
CE DATA 4
CE DATA 5
CE DATA 6
CE DATA 7
CE DATA 8
ACK
BUSY
PE
SELECT OUT
AUTO FEED
NOT USED
SIGNAL GROUND
CHASSIS GND
+5V
GND (1)
GND (2)
GND (3)
GND (4)
GND (5)
GND (6)
GND (7)
GND (8)
GND (9)
GND (10)
GND (11)
GND (31)
INIT
FAULT
GND (36)
NOT USED
NOT USED
SELECT IN
Data Strobe
Data 1
Data 2
Data 3
Data 4
Data 5
Data 6
Data 7
Data 8
Acknowledge
Printer Busy
Paper End
Printer On Line
Not Used
Not Connected
Ground Layer
Not Connected
Pull Up to +5V
Gnd (1)
Gnd (2)
Gnd (3)
Gnd (4)
Gnd (5)
Gnd (6)
Gnd (7)
Gnd (8)
Gnd (9)
Gnd (10)
Gnd (11)
Gnd (31)
Soft Reset
Printer Error
Gnd (36)
Not Connected
Not Connected
Not Used
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
19
20
21
22
23
24
25
26
27
28
29
31
33
Host
Host
Host
Host
Host
Host
Host
Host
Host
Printer
Printer
Printer
Printer
Host
Host
Host
Host
Printer
Host
Host
Host
Host
Host
Host
Host
Host
Host
Host
Host
Host
Host
Printer
Host
Host
Host
Host