Patent ID: 6172764
Filing Date: 2001-01-09
Classification: G06K

Abstract:
An ink jet printer, connected to a host machine through parallel signal lines of a predetermined number of bits, and including a microprocessor, wherein reverse data is sent in a nibble mode from said microprocessor to said host machine through said parallel signal line, comprising:a reverse data register for receiving reverse data having a number of bits greater than the predetermined number of bits from said microprocessor;a state-transitional signal creating means for creating a state transitional signal based on a particular signal from said host machine; anda data switch for receiving to send onto a bus signal line, a first portion and a second portion of the reverse data respectively having a number of bits smaller than the predetermined number of bits at different timings in response to the state transitional signal, said state-transitional signal creating means controlling the flow of reverse data through said data switch to the host machine without burdening the microprocessor of the ink jet printer.