Oki C9850 Maintenance Manual page 19

1.5.3.5 Parallel Interface Signal
The name of the interface signal and pin number is indicated in Table 9-1.
Pin No. Signal Name
1 nStrobe
(HostClk)
2 DATA 1
3 DATA 2
4 DATA 3
5 DATA 4
6 DATA 5
7 DATA 6
8 DATA 7
9 DATA 8
10 nAck (PtrClk)
11 Busy (PtrBusy)
12 PError (AckDataReq) FROM PRINTER Paper error takes place during High Level.
13 Select (Xlag)
14 nAutoFd (HostBusy)
15 Unused
16 GND
17 FG
18 +5V
19 to GND
30
31 nInit (nInit)
32 nFault (nDataAvail)
33 GND
34 Unused
35 HILEVEL
36 nSelectIn
(IEEE1284 active)
Note! Nibble mode signal names are indicated in the ( ).
Only indicates the Compatible Mode functions.
This printer supports the IEEE 1284-1994 Nibble Mode standardized by the Institute of
Electric and Electronic Engineers (IEEE). Note that use of PCs and cables that do not
comply with this standard may result in unforeseeable operations.
43627911TH Rev. 3
Table 1-1 Signals
Direction
TO PRINTER Pulse to read data.
Data is read with the latter wire.
TO PRINTER 8bit parallel data.
High Level:
"Low Level:
FROM PRINTER Signal indicating completion of incoming data.
FROM PRINTER Indicates whether the printer state can accept
data or not.Data cannot be accepted during High
Level.
FROM PRINTER Always High Level when the parallel interface is
active.
TO PRINTER Used for two-way communications.
– Unconnected
– Ground for signal.
– Ground for chassis.
FROM PRINTER Provides +5V. Cannot supply power to an
external device.
– Ground for signal.
TO PRINTER Printer is initialized during Low Level.
FROM PRINTER When printer is alarming the printer goes to Low
Level state.
– The ground for signals
– Un-connecting.
FROM PRINTER 3.3kW inside printer is pulled up by +5V.
TO PRINTER Used for two-way communications. Always in
Low Level in the compatible mode.
Oki Data CONFIDENTIAL
Function
"1
"0"
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