Compuprint 3056 User Guide

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The least significant bit of the data bits is sent first after the start bit. The number of data bits is 
selected via menu. The parity bit, when present, follows the data bits. The start bit is a logical "0" 
and the stop bit is a logical "1". The start and stop bits are used as character framing bits. 
•  Printer Connector 
Male DB9 . 
•  Drive Capability 
Max. 50 feet (15 m) for all supported data rates.   
 
S
S
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l
 
 
I
I
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a
a
c
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S
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g
g
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The following table lists the RS-232/C serial interface signals used: 
 
Pin  
Number 
Description 
Signal  
Name 
Not Connected 
5V Power Supply if 
necessary 
 
Receive Data 
RXD 
Transmit Data 
TXD 
Data Terminal Ready  DTR 
Signal Ground 
GND 
Data Set Ready 
DSR 
 
3
3
.
.
 
 
U
U
S
S
B
B
 
 
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c
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USB interface accords with USB 1.1 criterion. 
Cable connector: 
  B Type 
The following table lists the USB interface signals used: 
 
USB Pin 
Description 
USB 5V Power Supply   
USB D- 
USB D+ 
USB GND