Printer detecting data precisely in response to change in...

Details Printer detecting data precisely in response to change in... Printer detecting data precisely in response to change in...

2005-10-04

2005-10-04

Tran, Douglas (Department: 2624)

Facsimile and static presentation processing

Static presentation processing

Communication

C358S001130

Reexamination Certificate

active

06952276

ABSTRACT:
A printer, which is connected to a host computer, comprises a synchronizing signal output section for outputting a synchronizing signal to the host computer, a data detection section for detecting print data received from the host computer by using a sampling signal, and a print processing execution section for performing print processing based on the detected print data, wherein the sampling signal has a frequency higher than the synchronizing signal has. Upon detection of a change command for changing the clock rate of the synchronizing signal from the host computer, the printer may give a signal to the host computer for instructing the host computer to stop transmitting data and change the synchronizing signal into the clock rate specified in the change command. Upon completion of changing the clock rate of the synchronizing signal, the printer may output a signal to the host computer for instructing the host computer to restart transmitting data. A count value is counted by a timer in sequence and each time the expiration of the counting is reached, a data output command signal may be output to a data transmission section and data of a predetermined length may be transmitted from the data transmission section to the host computer.

REFERENCES:
patent: 4930087 (1990-05-01), Egawa et al.
patent: 5123757 (1992-06-01), Nagaoka et al.
patent: 5542071 (1996-07-01), Maupin et al.
patent: 5822522 (1998-10-01), Kazama
patent: 5881240 (1999-03-01), Asano
patent: 5905759 (1999-05-01), Ishida et al.
patent: 596752 (1994-05-01), None

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