A3.1.11 Centronics Parallel Interface - Oki OF5900 Maintenance Manual

R76-/R76-2

A3.1.11 Centronics Parallel Interface

The LSI sets a BUSY-P signal to ON at the same time when it reads the parallel data
(PDATA1-P to PDATA8-P) from the parallel port at the fall of STB-N signal. Furthermore, it
makes the store processing of receiving data into a receive buffer terminate within a certain
fixed time and outputs an ACK-N signal, setting the BUSY-P signal to OFF.
OKIFAX 5700/5900
32, 33, 35 - 38, 40, 41
PDATA1-P to PDATA8-P
29
45
46
47
LSI
43
44
28
27
26
PARALLEL DATA
(DATA BITs 1 to 8)
0.5 s min.
DATA STOROBE
BUSY
ACKNOWLEDGE
33V
STB-N
BUSY-P
ACK-N
PE-P
SEL-P
FAULT-N
PINIT-N
SELIN-N
AUTOFEED-P
+5V
0.5 s min.
0.5 s max.
0 min.
0.5 s to 10 s
A3 - 22
NSX
Interface IC
IC30
5V
DATA8-P
to
DATA1-P
2 to 9
STB-N
1
BUSY-P
11
ACK-N
10
PE-P
12
SEL-P
13
FAULT-N
32
IPRIME-N
31
SELIN-N
36
AUTOFEED-P
14
+5V
18
0.5 s min.
0.5 s min.
0 min.
0 min.
0 min.