Oki B721 Maintenance Manual

Oki Data CONFIDENTIAL
45487001TH Rev.1
1-11 /
1. Configuration
1.5.5 Parallel interface specications (Parallel installed
Model only)
1.5.5.1 Parallel interface overview
Item Details
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.)
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
Signal
direction
Compatible Nibble ECP
1
DATA ST ROBE
→
PR nStrobe HostClk HostClk
2-9 DATA BI T - n
→
PR Data 1 (LSB) - 8 (MSB)
10
ACKNOWLEDGE
←
PR nAck PtrClk PeriphClk
11 BUSY
←
PR Busy PtrBusy PeriphAck
12 PAPER END
←
PR Perror AckDataReq nAckReverse
13 SELECT
←
PR Select Xag Xag
Pin No. Signal name
Signal
direction
Compatible Nibble ECP
14
AUTO FEED
→
PR nAutoFd HostBusy HostAck
15 - - -
16 0V - Logic Gnd
17
CHASSIS
GROUND - Chassis Gnd
18 +5V
←
PR Peripheral Logic High
19 0V - Signal Ground (nStrobe)
20-27 0V - Signal Ground (Data 1-8)
28 0V - Signal Ground (Perror,Select,nAck)
29 0V - Signal Ground (Busy,nFault)
30 0V - Signal Ground (nAutoFd,nSelectIn,nInit)
31
INPUT PRIME
→
PR nInit nInit
nReverse-
Request
32
FAU LT
←
PR nFault nDataAvail
nPeriph-
Request
33 0V - -
34 - - -
35 Hi Level
←
PR Pulled up to +5V through 3.3Kohm
36
SEL-IN
→
PR nSelectIn 1284 Active 1284 Active
1.5.5.4 Parallel interface levels
Low level: 0.0V to +0.8V
High level: +2.4V to +5.0V
1
18
1936

Oki B721 Specifications

General

Print Technology	LED
Resolution	1200 x 1200 dpi
Processor	533 MHz
Memory	256 MB
Connectivity	USB, Ethernet
Duplex Printing	Standard