Centronics Parallel Interface - Oki OKIPAGE 10ex Troubleshooting Manual

3.5

Centronics Parallel Interface

The CPU sets a BUSY-P signal to ON at the same time when it reads the parallel data (PDATA1-
P to PDATA 8-P) from the parallel port at the fall of PSTB-N signal. Furthermore, it makes the store
processing of received data into a receive buffer terminate within a certain fixed time and outputs
an ACK-N signal, setting the BUSY-P signal to OFF.
CPU
PARALLEL DATA
(DATA BITs 1 to 8)
DATA STOROBE
BUSY
ACKNOWLEDGE
40990901TH Rev.1
87, 88, 91 to 96
PDATA1-P to PDATA8-P
97
PSTB-N
85 PBUSY-P
86 PACK-N
83 PPE-P
81 PSEL-P
79 PERROR-N
PINIT-N
80
82 PSELIN-N
84 PAUTOFD-N
5V
0.5 s min.
0.5 s min.
0.5 s max.
0 min.
0.5 s to 10 s
CENT
2 to 9
1
IC11
11
10
12
13
32
31
36
14
+5V
18
3.9k
0.5 s min.
0.5 s min.
0 min.
0 min.
DATA8-P
to
DATA1-P
STB-N
BUSY-P
ACK-N
PE-P
SEL-P
FAULT-N
IPRIME-N
SELIN-N
AUTOFEED-N
+5V
0 min.
13 /