Oki ML1120, Technical Reference Manual

Page: 20 / 254

Technical Reference Guide – Interface specifications > 20
P
ARALLEL INTERFACE SIGNALS
NOTE
P
ARALLEL INTERFACE LEVELS
Low level: 0.0 V to + 0.8 V
High level: +2.4 V to +5.0 V
STROBE
DATA BIT 1
DATA BIT 2
DATA BIT 3
DATA BIT 4
DATA BIT 5
DATA BIT 6
DATA BIT 7
DATA BIT 8
ACKNLG
BUSY
PE
SEL
AUTO FEED
GND
CHASSIS GROUND
GND
INIT
ERROR
SLCT IN
1
2
3
4
5
6
7
8
9
10
11
12
13
14
16, 33
17
18
19 to 30
31
32
15, 34
35
36
To printer
To printer
From printer
From printer
From printer
From printer
To printer
To printer
From printer
To printer
Samples input data when changing from low
level to high level.
Input data: High level indicates 1 and low
level 0 .
Indicates character input completion, or function
operation end, at low level.
Indicates data cannot be received at high level.
Data can be input at low level.
High level indicates paper end.
High level indicates select (on line) condition.
Signal ground.
Frame ground.
Twisted pair return (for pin No. 1 to 11)
This signal goes from high to low level when
paper runs out.
(Possible to indicate error and Off Line state).
Unused
Fixed to High (Connected to +5 V via 3.3 K
Ω
)
Connected to input port
HostClk
PrtClk
PrtBusy
AckDataReq
Xflag
HostBusy
nDataAvail
IEEE1284
active
Signal
Description
Compatible Nibble
PinNo. Direction
“Auto Feed” in menu set as valid in EPS mode
Fixed to High (Connected to + 5 V via 235 K )
Ω
Connector pin arrangement for above.
18
36
1
19