Parallel I/F Signals - Oki C5100 Maintenance Manual

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1.5

Parallel I/F Signals

Table 8-1 shows interface signal names and pin numbers.
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
~
30
31
32
33
34
35
36
Note:
42049001TH Rev.1
Signal Name Signal Direction
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)
-
GND
FG
+5V
GND
Nlnit (nlnit)
NFault (nDataAvail)
GND
-
HILEVEL
Nselectin
(IEEE 1284 active)
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.
Table 8-1 Signals
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.
←PR
Indicates paper error when held HIGH.
←PR
HIGH without exception when the parallel
interface is enabled.
→PR
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.
←PR
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.
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