Print data editing circuit in serial printer

Details Print data editing circuit in serial printer Print data editing circuit in serial printer

1986-06-04

1989-04-25

Clark, David L.

Boots, shoes, and leggings

400121, B41J 312, G06F 312

Patent

active

048253898

ABSTRACT:
In a print data editing circuit in a serial printer of the invention, print data signals for odd pins (P1, P3, P9, P11, P17, P19) and other odd pins (P5, P7, P13, P15, P21, P23) in print data supplied from a buffer RAM are sequentially shifted and stored in first and second registers in response to a first write signal. Similarly, print data signals for even pins (P2, P4, P10, P12, P18, P20) and other even pins (P6, P8, P14, P16, P22, P24) are sequentially shifted and stored in third and fourth registers in response to a second write signal. The print data signals from the first through fourth registers are respectively latched by first through fourth buffer registers in response to an interrupt signal from a timer. The data signals are simultaneously output from the first through fourth buffer registers and supplied to a pin drive circuit.

REFERENCES:
patent: 4459050 (1984-07-01), Goldberg et al.
patent: 4487515 (1984-12-01), Harris
patent: 4508463 (1985-04-01), Wang et al.

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