BP-007 User’s Manual
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10 28 /ACK Answer out OUT
Pulse width is about 12µ sec. Low level
means that data is received and the
printer is ready for receiving more data.
11
29
BUSY Printer state OUT
High level out means that printer is busy
and can’t receive data. High level is out
from this pin on the following condition:
1. When data is being imported;
2. At the time of printing;
3. When the printer is offline;
4. When error happens.
12 30 PE Paper out OUT High level means paper out.
13 SLCT
Printer is
selected
OUT
High level (5V) with the 3.3KΩpull-up
resistor.
14
/AUTOFEED Auto feed IN
At low level, the printer will change to the
next line to print automatically after one
line printing is finished.
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 is
separated from logical ground.
18 NC Empty pin --- This pin is empty.
19～
30
GND Ground ---
Loop ground that is twisted with signal
line.
31 16 /INIT
Initialization of
printer
Input
Low level means initialization of printer
32 /ERROR
Error happens
with printer.
Out
When the printer is in state of paper out,
offline condition or error, this signal level
becomes low.
33 GND Ground ---
Same with 19～30 pins.
34 NC Empty pin --- This pin is empty.
35 +5V +5V supply Out
Pull up to 5V by the 3.3K Ω pull-up
resistor.
36 /SLCTIN
Printer is
selected and
answered.
In
Only when this signal level is low, can
the data be put into the printer.
The “direction” in the title panel means the flow direction of printer signal to the printer.
“Return” in the title panel means returning by pair-twist. You must confirm that the interface
cable is pair-twist shielding line, and every signal line is looped with ground line and pair-twisted
together. Shielding line should be connected with the frame ground of host computer and
printer.
All the interface condition is based on TTL level. The rising and falling time of signal must be
less than 0.2 ms.
The data transfer must comply with the specification of ACK or Busy signal. Only when the level
of ACK or Busy signal is low can data be transferred.
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