Specification Of Parallel Interface; General Of Parallel Interface; Connector And Cable Of Parallel Interface; Parallel Interface Level - Oki C711 Maintenance Manual

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1.5.4 Specification of parallel interface

1.5.4.1 General of parallel interface

Spec.
IEEE1284-1994 conforming parallel interface
Item
Related mode
Data bit length

1.5.4.2 Connector and cable of parallel interface

(1) Connector
Printer side : 36-Pole connector (Female)
57LE-40360-12(D56) (made by DDK) equivalent goods
Cable side : 36-Pole connector (male)
57FE-30360-20N(D8) (made by DDK) equivalent goods
18
36
Pin layout seen from interface cable side
(2) Cable
IEEE1284-1994 cable of less than 1.8m is used.
(For avoiding noise interference, please use shielded cable with the twisted-pair wire.)

1.5.4.3 Parallel interface level

Low level 0.0V~+0.8V
High level +2.4V~+5.0V
44205401TH Rev.1
Content
Compatible mode, nibble mode, and ECP mode
Compatible: 8, nibble: 4, ECP: 9bit
1
19

1.5.4.4 Signal of interface

Name of signal Direction
Pin NO.
1 nStrobe (HostClk) TO PRINTER It is a pulse to read data. Data is read by
2~9 DATA 1~DATA 8 Bi-direction
10 nAck(PtrClk) FROM
PRINTER
11 Busy(PtrBusy) FROM
PRINTER
12 PError FROM
(AckDataReq) PRINTER
13 Select(Xflag) FROM
PRINTER
14 nAutoFd(HostBusy) TO PRINTER It is used by the bidirectional communication.
15 - -
16 GND -
17 FG -
18 +5V FROM
PRINTER
19~30 GND -
31 nInit(nInit) TO PRINTER The printer is initialized with the low level.
32 nFault(nDataAvail) FROM
PRINTER
33 GND -
34 - -
35 HILEVEL FROM
PRINTER
36 nSelectIn TO PRINTER It is used by bidirectional communication. It
(IEEE1284 active)
Notes! • The signal name showed in the bracket is a signal name in nibble mode.
• It only describes the function in compatible mode.
• The nibble mode of IEEEstd1284-1994 regulated by Institute of Electrical
and Electronics Engineers is supported. Using the computer and the
cable unsupported this standard may lead to unexpected operation.
1. Configuration
Function
posterior end.
It is parallel data of 8 bits. The high level is
"1", and the Low level is "0".
It is a signal that shows the data reception
completion.
It is a signal that shows if the printer is
receiving the data. Data cannot be received
when it is at the high level.
The paper error is shown when it is at the
high level.
When parallel interface is effective, it is
always in high-level state.
Not use
Signal ground
Chassis ground
It cannot supply power outside.
Signal ground
When the printer is in alarm state, it
becomes low level.
Signal ground
Not use
It is pulled up to +5V at 3.3K in the printer.
must be low level when it is in compatible
mode.
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