Patent ID: 7568786

Claim:
A printhead assembly, comprising: at least one printhead module comprising at least two print nozzle integrated circuits, a support member supporting, and carrying printing fluid for, the print nozzle integrated circuits, and an electrical connector for connecting electrical signals to the print nozzle integrated circuits; a support frame removably supporting the printhead module and at least one mounting element; and drive electronics removable mounted to the mounting element to control operation of the print nozzle integrated circuits, the drive electronics having electrical contacts for electrical connection to the electrical connector, input contacts for receiving print data, and plurality of controllers for processing the print data, each controller being connected to a predetermined number of the print nozzle integrated circuits via the electrical contacts and being interconnected to the other controllers, wherein the drive electronics are selected from a range of drive electronics, each having a different number of said interconnected controllers configured to each process the print data applicable to a selected number of the print nozzle integrated circuits such that the ratio of controllers to print nozzle integrated circuits can be varied to change the print speed of the printhead assembly.