Patent ID: 7824000

Claim:
A head unit comprising: an input section to which control data that is used for controlling the discharging of liquid is inputted, the input section including a first input section and a second input section; a control data memorizing section that includes a first control data memorizing section that memorizes first control data for a first group of nozzles and a second control data memorizing section that memorizes second control data for a second group of nozzles; and a processing section that performs processing for memorizing the first control data and the second control data in the control data memorizing section, the processing section selectively performing either first processing or second processing, wherein, in the first processing, the first control data inputted from either one of the first input section and the second input section is memorized in the first control data memorizing section whereas the second control data inputted from the one of the first input section and the second input section is memorized in the second control data memorizing section; and in the second processing, the first control data inputted from the first input section is memorized in the first control data memorizing section whereas the second control data inputted from the second input section is memorized in the second control data memorizing section.