Oki PAGE 18, Service Manual, Page: 248 / 395

Page: 120
Service Guide OKIPAGE 18/18n
Chapter A Centronics Parallel Interface
Parallel Interface
(1) Connector
Printer side: 36 receptacle
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Type: 57RE-40360-830B-D29 (made by DDK) or equivalent
Cable side: 36-pin plug
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Type: 57-30360 (made by DDK) or equivalent
(2) Cable
Cable length: 6 feet (1.8 m) max.
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(a shielded cable composed of twisted pair wires is recommended for noise prevention).
3) Table of Parallel I/F signals
Pin No. Signal Name Signal
Direction Compatible Nibble ECP
1 DATA STROBE --> PR nStrobe Host Clk Host Clk
2 - 9 DATA BIT - n --> PR Data 1 (LSB) ~ 8
(MSB)
10
ACKNOWLEDGE <-- PR nAck Ptrclk PeriphClk
11 BUSY <-- PR Busy PtrBusy PeriphAck
12 PAPER END <-- PR Perror AckDataReq nAck Reverse
13 SELECT <-- PR Select Xflag Xflag
14
AUTO FEED --> PR nAutoFb HostBusy HostAck
15 -
16 0V Signal Ground
17 CHASSIS GROUND Chassis Ground
18 +5V ,__ PR +5V supply
(50mAm)
19 0V Signal Ground
20~27 0V - Signal Ground
28 0V - Signal Ground
29 0V - Signal Ground
30 0V - Signal Ground
31
INPUT PRIME --> PR nInit nInit nPeriphRequest
32
FAULT <-- PR nFault nDataAvail nPeriphRequest
33 0V -
34 - -
35 HILEVEL <-- PR High Level
36 SEL-IN -- PR nSelectln 1284 Active 184 Active
Connector pin arrangement
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