
SRP-F310/312 
4-3-6  Parallel Communication Block Diagram
The printer support the bidirectional Parallel Interface with Centronics, Nibble, Byte Mode. The Centronics is Forward and the Nibble, Byte are reverse Mode.
[Figure 4-10  IEEE1284 Communication Block Diagram]
4-3-7  USB Communication Block Diagram
The printer support the USB (Universal Serial Bus). The transfer type of the printer is the BULK.
[Figure 4-11  USB2.0 Communication Block Diagram]
4-3-8  DIP Switch Circuit
The key board circuit consist of the scan signal of 3 lines and the return signal of 
[Figure 4-12  USB Communication Block Diagram]
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