Oki OKIFAX 5950 Series Maintenance Manual page 450

R76-
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.
PARALLEL DATA
(DATA BITs 1 to 8)
DATA STOROBE
BUSY
ACKNOWLEDGE
OF5750/5950 Series January 2001
32, 33, 35 - 38, 40, 41
PDATA1-P to PDATA8-P
29
STB-N
45
BUSY-P
46
ACK-N
47
PE-P
LSI
43
SEL-P
44
FAULT-N
28
PINIT-N
27
SELIN-N
26
AUTOFEED-P
0.5 µs min.
0.5 µs min.
0.5 µs max.
Interface IC
IC30
3.3V 5V
2 to 9
+5V
Fuse
tA
0.5 µs min.
0.5 µs min.
0 min.
0 min.
0.5 µs to 10 µs
A3 - 22
NSX
DATA8-P
to
DATA1-P
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 min.
0 min.