Daewoo DPL-400, Operation Manual

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9. Timing Chart
* Propagation Delay Time less than 200 usec.
Interface Levels TTL level
10. Input/Output Signal
° DATA (DO-D7)
8 bit data input signals, ‘High’ represents logic ‘1’
° STROBE
The strobe input signal js used to read in 8 bits of data. Data is read in when the
signal goes ‘LOW’.
° BUSY
This output signal indicates that the printer is busy and it will not accept data
when it goes ‘High’.
° ACKNOWLEDGE
This output ‘low’ signal indicates the printer can accept next data input.