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Compuprint 10300 User Guide

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Interfaces 
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Description of the signals in monodirectional link: 
 
Signal Name   Pin N° 
Source 
Description 
STROBE 
1 
HOST 
Clock signal which controls data transmission with its falling edge. 
ACK 
10 
PRINTER 
Negative pulsed signal indicating that the printer has received data and 
is ready to accept the next set of data. Also sent when the printer is 
switched from off-line to on-line and at the end of the initialization time. 
The BUSY line is always active. 
DATA BIT 1 
DATA BIT 2 
DATA BIT 3 
DATA BIT 4 
DATA BIT 5 
DATA BIT 6 
DATA BIT 7 
DATA BIT 8 
2 
3 
4 
5 
6 
7 
8 
9 
PRINTER / 
HOST  
Data 8 is the most significant bit. These are the data lines used by host 
or printer to transfer control code or ASCII codes. 
BUSY 
11 
PRINTER 
When high, this signal indicates that the printer cannot accept data 
or control codes. This signal goes high during data processing, in 
test and program modes, during initialization, when the buffer is full, 
and when a paper jam, paper end or paper size error occurs, in case 
of a power-on reset, the reception of a STROBE signal, while the 
register was not yet read, or when the INIT line is still active. 
PE 
12 
PRINTER 
When high, this signal indicates that the automatic input bin is out of 
paper and paper cannot be loaded from an other bin.