Ink jet printhead module and ink jet printer

An ink jet printer, comprising:

• a printhead drive unit, comprising a printhead drive circuit and a printhead selection circuit, the printhead drive circuit being capable of outputting a plurality of address signals, the printhead selection circuit being capable of outputting at least one selection signal and at least one decoding control signal;
• and
• at least one ink jet printhead module, the ink jet printhead module being capable of receiving the address signals, the corresponding selection signal, and the corresponding decoding control signal, wherein the ink jet printhead module comprises:
• a decoding circuit, being capable of receiving the corresponding selection signal and the corresponding decoding control signal and outputting a plurality of chip selection signals;
• and
• a plurality of chip control circuits, each of the chip control circuits being capable of receiving the address signals and receiving a corresponding one of the chip selection signals,
• wherein each of the chip control circuits comprises:
• a plurality of switching circuits, each of the switching circuits being capable of receiving a corresponding one of the address signals and the corresponding one of the chip selection signals and outputting a switching signal;
• and
• an ink jetting circuit set, including a plurality of ink jetting circuits, each of the ink jetting circuits being capable of receiving the switching signal from the corresponding switching circuit electrically coupled to the ink jetting circuit and determining whether or not to jet out ink based on the received switching signal, and wherein the corresponding one of the address signals and the corresponding one of the chip selection signals have a voltage level of a logic high voltage level and a logic low voltage level, the switching signal is a logic high voltage level and selectively enables the ink jetting circuit when the corresponding one of the address signals and the corresponding one of the chip selection signals are at the logic high voltage level.