Decision Data IS-488, Руководство пользователя

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Pin Assignments
Parallel Interface
To ensure proper operation. Use a fully-loaded 25 conductor cable with shield.
Signal Name PIN # Source Description
_______
STROBE 1 Host Clock signal controlling data transmission. Active low
signal.
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
Host Represents the code of a character to be printed or a
control to be executed.
Logical “0” is represented by a LOW level signal;
Logical “1” is represented by a HIGH level signal.
Data BIT 1 (pin 2) is the Least Significant Bit;
Data BIT 8 (pin 9) is the Most Significant Bit.
____
ACK 10 Printer Active LOW level signal that indicates that data has been
received and stored in the buffer.
BUSY 11 Printer An active HIGH level signal which indicates that the printer
cannot accept input data or control codes.
PE 12 Printer An active HIGH level which indicates that no paper is
loaded or a paper jam exists.
SLCT 13 Printer An active HIGH level which indicates the printer is selected,
online and is ready to receive data.
AUTOFEEDXT 14 Host Active HIGH level.
______
ERROR 15 Printer Active LOW level signal that indicates that one of the Paper
Empty conditions has occurred.
____
INIT 16 Host Active LOW level signal that starts a printer initialization
cycle.
_______
SLCTIN 17 Host Active LOW level signal that allows data to be transmitted
to the printer.
GND 18-25 - Common ground signal. To ensure proper operation,use a
fully-loaded 25 conductor cable.
Chassis Ground - - Frame ground for the cable shield.
E-2