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GENERAL SPECIFICATIONS
4.
Parallel Interface
4-1. General Specifications
Item
Interface
Synchronization System
I/F Protocol
Logic Level
4-2. Connector Signals
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14-15
16
SIGNAL GND
17
18
19 - 30
31
32
33
34 - 36
Fig. 1-5 Timing Charts of Parallel Interface
Name
STROBE
Goes low for 0.5 s when active.
DATA0
These signals represent information for the 1st through 8th bit of
DATA1
parallel data, respectively. Each signal is HIGH when data is logical 1,
DATA2
and LOW when logical 0.
DATA3
DATA4
DATA5
DATA6
DATA7
ACK
10 s low to acknowledge receipt of data.
BUSY
Printer sets line low when ready to receive data.
PAPER
High when paper runs out.
SELECT
High when printer is on-line.
Signal ground
CHASSIS
Chassis ground (isolated from signal ground)
+5V
+5V DC output from printer
GND
Twisted pair ground return
RESET
Printer is reset when this signal goes low.
ERROR
Low when printing cannot continue due to error.
EXT GND
External ground
Specifications
Centronics-compatible
Via externally supplied STROBE pulse
By ACK and BUSY signals
Compatible with TTL level
Not used.
Not used
– 8 –
Function
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