Parallel I/F Signals - Oki C9500 Maintenance Manual

1.5

Parallel I/F Signals

Table 8-1 shows interface signal names and pin numbers.
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)←PR
13 Select (Xflag)
NAutoFd (HostBusy) →PR
14
15 -
16 GND
17 FG
18 +5V
19
~ GND
30
31 Nlnit (nlnit)
NFault (nDataAvail) ←PR
32
33 GND
34 -
35 HILEVEL
36 Nselectin
(IEEE 1284 active)
Note: Parenthesized signal names are used in nibble mode.
Only functions in compatible mode are listed.
The C9300/C9500 series of printers 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.
41956001TH Rev.6
Table 8-1 Signals
Signal Direction Functions
→PR
Pulse for reading data in at trailing edge.
8-bit parallel data.
→PR
Each signal is HIGH when data is logical 1 and
LOW when it is logical 0.
←PR
Indicates the completion of data reception.
←PR
Indicates whether the printer is ready for receiving
data. Data cannot be received while the signal is
HIGH.
Indicates paper error when held HIGH.
←PR
HIGH without exception when the parallel
interface is enabled.
Used in bidirectional communication.
Unassigned.
Signal ground.
Chassis ground.
←PR
Used for supplying +5V. Power cannot be
supplied to the outside of the printer.
Signal ground.
→PR
Initializes the printer when held LOW.
LOW during alarm.
Signal ground.
Unassigned.
←PR
Pulled up to +5V at 3.3KΩ inside the printer.
→PR
Used in bidirectional communication. Low without
exception in compatible mode.
Oki Data CONFIDENTIAL
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