Printing apparatus

A printing apparatus comprising:

• a print head comprising (1) a plurality of heaters for heating and ejecting ink and (2) a fuse for retaining information;
• and
• a print head control unit configured to control the print head,
• wherein the print head control unit comprises (1) a heater drive control unit configured to control drive of the plurality of heaters and (2) a write pulse generation unit configured to generate a write pulse for performing write for the fuse,
• wherein data that is generated by the heater drive control unit and the write pulse are transmitted from the print head control unit to the print head via an identical terminal and an identical signal line, and
• wherein the print head control unit further comprises (1) a GPIO that generates a signal at a constant level of High or Low and (2) a mode selection switching unit configured to switch between heater control and fuse control.