OKIDATA Okipage6e, Service Manual

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Page: 86
Service Guide OKIPAGE6e
Chapter A Centronics Parallel Interface
Connector
Printer side 36-pin receptacle
(single port) Type 57-40360-12-D56 (made by Daiichi Denshi) or
equivalent
Cable side 36-pin plug
Type 57-30360 (made by Daiichi Denshi) or equivalent Plug-552274-1 (AMP),
552073-1 (AMP) or equivalent
Cable
IEEE std 1284-1994 compliant cable is recommended for noise prevention.
Cable length 6 ft (1.8 m) max.
Note: Cable is not supplied.
Table of Parallel Interface Signals
Pin
No. Signal Name Signal
Direction Logic Compatibl
e Nibble ECP Functions
1 Data Strobe ® Printer Negative nStrobe Host Clk HostClk Data strobe
2-9 Data Bit n « Printer Positive Data 1(LSB) ~ 8(MSB) Data line from/to
host
10 Acknowledge Printer ® Negative nAck PtrClk PeriphClk Completion of
reception or
function
11 Busy Printer ® Positive Busy PtrBusy PeriphAck Data reception not
possible
12 Paper End Paper End Positive PError AckDataRe
q nAckRevers
e No paper
13 Select Printer ® Positive Select Xllag Xflag On-line
14 Auto Feed ® Printer Negative nAutoFd HostBusy HostAck Mode switch
request
15 - - - Not defined Not used
16 0V - - Logic Gnd Signal ground
17 Chassis
Ground - - Chassis Gnd Frame ground
18 5V Printer ® - Peripheral Logic High Power supply
(max. 50mA)
19 0V - - Signal Ground (nStrobe) Signal ground
20-2
7 0V - - Signal Ground (Data 1~
8) Signal ground
28 0V - - Signal Ground (PError,
Select, nAck) Signal Ground
29 0V - - Signal Ground (Busy,
nFault) Signal ground
30 0V - - Signal Ground (nAutoFd,
nSelectln, nlnit) Signal ground