Oki Data CONFIDENTIAL
42049001TH Rev.1 136 /
1.5 Parallel I/F Signals
Table 8-1 shows interface signal names and pin numbers.
Table 8-1 Signals
Pin No. Signal Name Signal Direction Functions
1 Nstrobe (HostClk) →PR Pulse for reading data in at trailing edge.
2 DATA 1
3 DATA 2
4 DATA 3 8-bit parallel data.
5 DATA 4 →PR Each signal is HIGH when data is logical 1 and
6 DATA 5 LOW when it is logical 0.
7 DATA 6
8 DATA 7
9 DATA 8
10 nAck (PtrClk) ←PR Indicates the completion of data reception.
11 Busy (PtrBusy) ←PR Indicates whether the printer is ready for receiving
data. Data cannot be received while the signal is
HIGH.
12 PError (AckDataReq) ←PR Indicates paper error when held HIGH.
13 Select (Xflag) ←PR HIGH without exception when the parallel
interface is enabled.
14 NAutoFd (HostBusy) →PR Used in bidirectional communication.
15 - - Unassigned.
16 GND - Signal ground.
17 FG - Chassis ground.
18 +5V ←PR Used for supplying +5V. Power cannot be
supplied to the outside of the printer.
19
~ GND - Signal ground.
30
31 Nlnit (nlnit) →PR Initializes the printer when held LOW.
32 NFault (nDataAvail) ←PR LOW during alarm.
33 GND - Signal ground.
34 - - Unassigned.
35 HILEVEL ←PR Pulled up to +5V at 3.3KΩ inside the printer.
36 Nselectin →PR Used in bidirectional communication. Low without
(IEEE 1284 active) exception in compatible mode.
Note:
Parenthesized signal names are used in nibble mode.
Only functions in compatible mode are listed.
This printer supports the IEEE std 1284-1994 nibble mode. Note that, when used with
personal computers or cables that do not comply with the standards, the printers may
exhibit unpredictable behavior.
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