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Return
Pin
Pin
Note:
The column heading "Direction " refers to the direction of signal flow OS
ground level. For the interface wiring, be sure to use a twisted-pair
cub/e for each signal and to complete the connection on the return
side.
A//interface conditions are based on the TJL level. Both the r!.se and full
times of each signal must be less than 0.2 microseconds.
Data transfer must be carried out by observing the ACKNl G or BUSY
signal. Data transfer to this printer can be carried out only after receipt
of the ACKNl G signal or when the BUSY signal is LOW.
Initialization
The printer can be initialized (returned to a fixed set of conditions) in
three ways:
Hardware initialization
A-10 Appendix
ERROR
OUT
NC
OUT
IN
NC
*The printer receives an Ksignal from the
parallel interface (pln 31 goes LOW).
The followlng condltlon then results:
This level becomes LOW
when the printer:
pressed
Same as for pins 19-30
Pulled up to 5 V through
1 .O kg resistance
Not used
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