43827101TH Rev.2
19 /
Oki Data CONFIDENTIAL
1.5.1.5 Parallel Interface Signal
The name of the interface signal and pin number is indicated in Table 9-1.
Table 1-1 Signals
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.
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19 to 30
31
32
33
34
35
36
Direction
TO PRINTER
TO PRINTER
FROM PRINTER
FROM PRINTER
FROM PRINTER
FROM PRINTER
TO PRINTER
—
—
—
FROM PRINTER
—
TO PRINTER
FROM PRINTER
—
—
FROM PRINTER
TO PRINTER
Signal Name
nStrobe
(HostClk)
DATA 1
DATA 2
DATA 3
DATA 4
DATA 5
DATA 6
DATA 7
DATA 8
nAck (PtrClk)
Busy (PtrBusy)
PError (AckDataReq)
Select (Xflag)
nAutoFd (HostBusy)
Unused
GND
FG
+5V
GND
nInit (nInit)
nFault (nDataAvail)
GND
Unused
HILEVEL
nSelectIn
(IEEE1284 active)
Function
Pulse to read data.
Data is read with the latter wire.
8bit parallel data.
High Level:
"1"
Low Level:
"0"
Signal indicating completion of incoming data.
Indicates whether the printer state can accept data
or not.
Data cannot be accepted during High Level.
Paper error takes place during High Level.
Always High Level when the parallel interface is
active.
Used for two-way communications.
Unconnected
Ground for signal.
Ground for chassis.
Pr5V. Cannot supply power to an external
device.
Ground for signal.
Printer is initialized during Low Level.
When printer is alarming the printer goes to Low
Level state.
The ground for signals
Un-connecting.
It is pulled up by +5V through 3.3k .
Used for two-way communications. Always in Low
Level in the compatible mode.
Note