Printhead assembly with electrically interconnected print engine controllers

A printhead assembly, comprising:

• at least one printhead module comprising at least two printhead integrated circuits, each of which has nozzles formed therein for delivering printing fluid onto the surface of print media, a one-piece support member commonly supporting and carrying the printing fluid for the at least two printhead integrated circuits, and an electrical connector for connecting electrical signals to the at least two printhead integrated circuits;
• drive electronics incorporating at least two controllers for processing print data and controlling the printing operation of at least one of the at least two printhead integrated circuits via the electrical connector to print the processed print data, the at least two controllers being interconnected;
• a mounting element on which the drive electronics are mounted;
• and
• a casing removably mounting the at least one printhead module and the mounting element, the printhead module having a first tab received in a recess of a support channel of the casing and a second tab clamped between the support channel and a clamping arrangement of the mounting element so as to allow constrained movement of the print module relative to the support channel during use, the casing being configured to removably mount the printhead assembly to a printer unit.