Read/write memory having an on-chip input data register

Details Read/write memory having an on-chip input data register Read/write memory having an on-chip input data register

1987-08-05

1990-10-02

Moffitt, James W.

Static information storage and retrieval

Addressing

Multiple port access

36523002, 36518905, 365195, G11C 800

Patent

active

049611712

ABSTRACT:
A dual-port memory having an on-chip color register for storage of input data for use in multiple write cycles is disclosed. The color register is written to during a special cycle, which is enabled by a special function pin in conjunction with the write enable and transfer enable function pins, each of which have their logic state latched in during the row address strobe signal. A second type of special cycle causes a multiplexer to select the contents of the color register, rather than the latched data state of the data input terminals, for the data to be written to the selected memory cells. The use of the color register may be used in conjunction with a mask register, where the writing of certain input/outputs in inhibited. In addition, a block write feature may be incorporated with the color register so that, in another type of special cycle, multiple columns per input/output can be simulaneously written with the contents of the color register. The dual port memory containing the color register thus may rapidly store a bit-mapped graphical image where areas of the image are "filled" with the same color information.

REFERENCES:
patent: 3761902 (1973-09-01), Weinberger
patent: 4636986 (1987-01-01), Pinkham
patent: 4639890 (1987-01-01), Heilveil et al.
"Preliminary Target Spec-HM53462-10/12/15", Jun. 7, 1985, Rev. 1-Hitachi Semiconductor & Integrated Cir. Div.

Affiliated with

Also associated with

Rating

Read/write memory having an on-chip input data register does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Read/write memory having an on-chip input data register, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Read/write memory having an on-chip input data register will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-295925