When this level becomes

LOW, the printer controller is

 

 

 

 

 

 

 

reset to its power-on state

 

 

 

 

 

 

 

and the print buffer is

 

 

 

 

 

 

 

cleared This level is

 

 

 

 

 

 

 

normally HIGH: its pulse

 

 

 

 

 

 

 

width must be more than 50

 

 

 

 

 

 

 

microseconds at the

 

 

 

 

 

 

 

receiving terminal.

 

 

 

 

 

 

 

 

32

-

 

 

OUT

This level becomes LOW

ERROR

 

 

 

 

 

 

 

when the printer is:

 

 

 

 

 

 

 

1) out of paper

 

 

 

 

 

 

 

2) in an error state

 

 

 

 

 

 

 

33

-

GND

-

Same as for pins 19-30

 

 

 

 

 

 

 

34

-

NC

 

Not used

 

 

 

 

 

 

 

35

-

-

 

OUT

Pulled up to 5 V through

 

 

 

 

 

 

 

1 .O kR resistance

 

 

 

 

 

 

36

-

NC

-

Not used

 

 

 

 

 

 

 

 

Note:

P The column heading “Direction” refers to the direction of signal flow as viewed from the printer.

0“Return” denotes the twisted-pair return, to be connected at signal ground level. For the interface wiring, be sure to use a twisted-pair

cable for each signal and to complete the connection on the return side.

PAll interface conditions are based on the TTL level. Both the rise and fall times of each signal must be less than 0.2 microseconds,

Appendix A-9