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6.3
Parallel Interface - Centronics
This is an unidirectional interface that transfers 1 byte at a time.
Signal Name
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
Specifications
Description
Pin 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
Pin out
Source
1
19
Host
2
20
Host
3
21
Host
4
22
Host
5
23
Host
6
24
Host
7
25
Host
8
26
Host
9
27
Host
10
28
Printer
11
29
Printer
12
Printer
13
Printer
14
Host
15
Host
16
31
Host
17
Host
18
Printer
19
Host
20
Host
21
33
Host
22
Host
23
Host
24
Host
25
Host
26
Host
27
Host
28
Host
29
Host
30
Host
31
Host
32
Printer
33
Host
34
Host
35
Host
36
Host
6-4
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