Ieee 1284 Parallel Interface - Olivetti PR2 Service Manual

3.4.2 IEEE 1284 PARALLEL INTERFACE

The optional parallel Interface consists of a 36-pin Centronics connector.
The use of an interface cable of up to 1.5 meters long is suggested.
The ECP protocol is the data exchange protocol.
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S T R O B 0 1
DA C X (0 ) 0 2
D A C X (1 ) 0 3
D A C X (2 ) 0 4
D A C X (3 ) 0 5
D A C X (4 ) 0 6
D A C X (5 ) 0 7
D A C X (6 ) 0 8
D A C X (7 ) 0 9
A C K 0 0 1 0
B U S Y 1 11
PA P E M P 1 2
S E L O U T 1 3
A U T O L F 1 4
L O G IC G R O U N D 1 6
F R A M E G R O U N D 1 7
F R A M E G R O U N D 3 7
Fig. 3-5 Parallel Interface Connector
Service Manual
N C 1 5
+ 5 V 1 8
1 9 L O G IC G R O U N D
2 0 L O G IC G R O U N D
2 1 L O G IC G R O U N D
2 2 L O G IC G R O U N D
2 3 L O G IC G R O U N D
2 4 L O G IC G R O U N D
2 5 L O G IC G R O U N D
2 6 L O G IC G R O U N D
2 7 L O G IC G R O U N D
2 8 L O G IC G R O U N D
2 9 L O G IC G R O U N D
3 0 L O G IC G R O U N D
3 1 IM P R A
3 2 FA U LT C X
3 3 L O G IC G R O U N D
3 4 N C
3 5 T IR 0 0 (+ 5 V ; P U L L -U P ; 3 .3 K o h m )
3 6 S E L IN (IN P U T / S E L E C T IN )
3 8 S E L IN (IN P U T / S E L E C T IN )
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