Parallel Interface Specifications (Parallel Installed Model Only); Parallel Interface Overview; Parallel Interface Connector And Cable; Parallel Interface Signals - Oki B721 Maintenance Manual

Oki Data CONFIDENTIAL
1.5.5 Parallel interface specifications (Parallel installed
Model only)
1.5.5.1

Parallel interface overview

Item
Supported modes Compatible mode, nibble mode, ECP mode
Data bit length Compatible mode: 8 bit, Nibble mode: 4 bit, ECP mode: 9 bit
1.5.5.2

Parallel interface connector and cable

(1) Connector
Printer: 36-pole connector (female)
Product equivalent to RS6-36SKAAB4L00 (FU-YAO Tec. Co.,ltd.)
18
36
Connector pin arrangement
Cable: 36-pole connector (male)
(2) Cable
Use a cable of 1.8 m or less.
(Use a shielded twisted-pair cable for noise prevention.)
1.5.5.3

Parallel interface signals

Pin No. Signal name
direction
1 DATA STROBE
2-9 DATA BIT - n
10 ACKNOWLEDGE
11 BUSY
12 PAPER END
13 SELECT
45487001TH Rev.1
Details
1
19
Signal
Compatible Nibble ECP
→ PR
nStrobe HostClk HostClk
→ PR
Data 1 (LSB) - 8 (MSB)
← PR
nAck PtrClk PeriphClk
← PR
Busy PtrBusy PeriphAck
← PR
Perror AckDataReq nAckReverse
← PR
Select Xflag Xflag
Signal
Pin No. Signal name
direction
→ PR
14 AUTO FEED
15 - -
16 0V -
CHASSIS
17 GROUND -
← PR
18 +5V
19 0V -
20-27 0V -
28 0V -
29 0V -
30 0V -
→ PR
31 INPUT PRIME
← PR
32 FAULT
33 0V -
34 - -
← PR
35 Hi Level
→ PR
36 SEL-IN
1.5.5.4

Parallel interface levels

Low level: 0.0V to +0.8V
High level: +2.4V to +5.0V
1. Configuration
Compatible Nibble ECP
nAutoFd HostBusy HostAck
-
Logic Gnd
Chassis Gnd
Peripheral Logic High
Signal Ground (nStrobe)
Signal Ground (Data 1-8)
Signal Ground (Perror,Select,nAck)
Signal Ground (Busy,nFault)
Signal Ground (nAutoFd,nSelectIn,nInit)
nReverse-
nInit nInit
Request
nPeriph-
nFault nDataAvail
Request
-
-
Pulled up to +5V through 3.3Kohm
nSelectIn 1284 Active 1284 Active
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