Read-only memory having data register for holding output data

Details Read-only memory having data register for holding output data Read-only memory having data register for holding output data

1989-08-03

1992-09-29

Popek, Joseph A.

Static information storage and retrieval

Read only systems

395200, G11C 700

Patent

active

051518767

ABSTRACT:
A data register is provided through a column gate circuit in a ROM array in which font information is stored. Desired font information is read out as parallel data through the column gate circuit based on address information inputted to a row decoder and a column decoder. The data read out is stored once in the data register. Thereafter, the parallel data stored in the data register is outputted to a printing output circuit as serial data in synchronization with reception by a printing output circuit, thereby to perform printing processing. Consequently, font information to be printed need not be stored in a RAM or the like through a data bus, so that processing is simplified and the speed of a processing operation is increased.

REFERENCES:
patent: 3964591 (1976-06-01), Hill et al.
patent: 4289411 (1981-09-01), Cornelius et al.
patent: 4402067 (1983-08-01), Moss et al.
patent: 4646259 (1987-02-01), Lincoln et al.
patent: 4829484 (1989-05-01), Arimoto et al.
Makoto Ishihara et al., "Kanji Serial Printer PC-PR201, 101, 201CL" NEC Technical Journal, vol. 38, No. 3 (Feb. 20, 1985), pp. 98-102. English Translation.
Makoto Ishihara et al., "Kanji Serial Printer PC-PR201, 101, 201CL".
NEC Technical Journal, vol. 38, No. 3 (Feb. 20, 1985).
Technical data sheets for micro PD23C1000C, 23C1000D, and PD731002C CMOS ROMs (publication date not available).

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