Star Micronics NX-1020 - Serial Interface

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THEORY OF OPERATION
Fig. 2-3 Timing Chart of Parallel Interface
2-1-2. Serial Interface (option)
When the serial interface is used, an optional Serial-Parallel Converter is required to be installed. The converter will
change the voltage level (RS-232C <------> TTL) and the data transfer method (Serial <------> parallel).
Fig. 2-4 Serial Interface (in the Serial-Parallel Converter)