Parallel Interface; General Specifications; Connector Signals - Star Micronics LC-8211 Technical Manual

4.

Parallel Interface

4-1. General Specifications

Item
Interface
Synchronization System
I/F Protocol
Logic Level
ACK
Data
STROBE
(EDS B-6 : ON)
STROBE
(EDS B-6 : OFF)
BUSY

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
34~35
36 SELECT IN
5 s 5 s
Fig. 1-6 Timing Charts for Parallel Interface
Name
STROBE Goes low for 0.5 s when active.
These signals represent information for the 1st through 8th bit of
DATA0
parallel data, respectively. Each signal is HIGH when data is logical 1,
DATA1
and LOW when logical 0.
DATA2
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.
AFXT Printer ignores this signal.
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
Printer ignores this signal.
Specifications
Centronics-compatible
Via externally supplied STROBE pulse
Using ACK and BUSY signals
Compatible with TTL level
t t t t
t : More than 0.5 s
Not used.
Not used
– 9 –
GENERAL SPECIFICATIONS
Function