Parallel Interface Signals; Parallel Interface Levels - Oki ML1120 Technical Reference Manual

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