Oki OKIFAX OF5900, Maintenance Manual

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R76-/R76-2
OKIFAX 5700/5900 A3 - 22
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.
PDATA1-P to PDATA8-P
STB-N
LSI
32, 33, 35 - 38, 40, 41
29
STB-N
2 to 9
DATA8-P
to
DATA1-P
NSX
Interface IC
IC30
5V 33V
BUSY-P
45
BUSY-P
1
ACK-N
46
ACK-N
11
PE-P
47
PE-P
10
SEL-P
43
SEL-P
12
FAULT-N
44
FAULT-N
13
PINIT-N
28
IPRIME-N
32
SELIN-N
27
SELIN-N
31
AUTOFEED-P
26
AUTOFEED-P
36
14
+5V
+5V
18
0 min.
0 min. 0 min.
PARALLEL DATA
(DATA BITs 1 to 8)
DATA STOROBE
BUSY
0 min.
0.5
µ
s to 10
µ
s
0.5
µ
s max.
0.5
µ
s min.
0.5
µ
s min.
0.5
µ
s min.
0.5
µ
s min.
ACKNOWLEDGE