EC-PM-530B User's Manual
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(3) Definition of pins (as shown in table A-2)
Table A-2 Pin definition of parallel interface connector
Pin Return
Signal name
Direction
Description
1 19
/STROBE
Data
selected
IN Width
of selected pulse is 0.5µ sec.
2
20
DATA1
Date bit 1
IN / OUT
3
21
DATA2
Date bit 2
IN / OUT
4
22
DATA3
Date bit 3
IN / OUT
5
23
DATA4
Date bit 4
IN / OUT
6
24
DATA5
Date bit 5
IN / OUT
7
25
DATA6
Date bit 6
IN / OUT
8
26
DATA7
Date bit 7
IN / OUT
9
27
DATA8
Date bit 8
IN / OUT
Represent 8 bits of parallel data signal.
High level means logical “1”, low level
means logical “0”.
10 28 /ACK Answer
out OUT
Pulse width is about 12µ sec. Low level
means that data is received and the
printer is ready to receive more data.
11 29
BUSY Printer
state OUT
Outputting high level means that printer
is too busy to receive data. This pin
outputs high level under the following
conditions:
1. When data is being imported;
2. When the printer is printing;
3. When the printer is offline;
4. When error occurs.
12
30
PE
Paper out
OUT
High level means paper out.
13 SLCT
Printer is
selected
OUT
Pull up to 5V by the 3.3K
Ω
resistor.
14
/AUTOFEED Auto
feed IN
At low level, the printer will change to the
next line automatically after printing one
line.
15
NC
Empty pin
---
This pin is empty.
16
GND
Logical ground
---
Logical ground
17
CHASSIS
Structure
ground
---
It is structure ground of printer, and it is
separated from logical ground.
18
NC
Empty pin
---
This pin is empty.
19~30
GND
Ground ---
Loop ground that is twisted with signal
wire.
31 16 /INIT
Initialization of
printer
IN
Low level means the printer is initialized
32 /ERROR
Error occurs
in printer.
OUT
When the printer is in state of paper out,
offline mode or error, this signal level
becomes low.
33
GND
Ground
---
Same with 19~30 pins.
34
NC
Empty pin
---
This pin is empty.
EC Electronics, Ltd.
www.eclinepos.com
EC Electronics, Ltd
No. 221 Wai Yip Street, Kwun Tong
Kowloon, Hong Kong
TEL : (852) 3590 6397
FAX : (852) 3590 6497
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