Static information storage and retrieval – Magnetic bubbles – Guide structure
Patent
1989-12-20
1993-11-09
Lee, Thomas C.
Static information storage and retrieval
Magnetic bubbles
Guide structure
36518905, 395800, 364DIG1, 3642328, 3642612, 3642715, G06F 122, G06F 1500
Patent
active
052610764
ABSTRACT:
A programmable buffer chip and programming method therefor are provided in which program information is entered into the buffer chip during a time period appended to the end of an ordinary reset period and so disguised as an extension of the reset period. Program information determines the buffer status conditions to be monitored at buffer status pins, and includes first offset data and a second offset data. A non-zero value in the first offset data indicates an offset defining an almost-full condition to be monitored. A non-zero value in the second offset data indicates an offset defining an almost-empty condition to be monitored. A program indicator bit in the program information indicates whether the buffer half-full condition, or both the full and the empty condition will be monitored at a particulat buffer status pin. The buffer is programmed by first causing the buffer chip to enter a reset mode, and then entering the program information in a disguised reset period following the actual reset period. Accordingly, the buffer requires no dedicated programming pin and is made backward compatible with a nonprogrammable basic buffer chip having the same number of I/O pins. The program information may also include an indication to the buffer chip whether to inhibit from resetting upon next entering the reset mode.
REFERENCES:
patent: 4432049 (1984-02-01), Shaw
patent: 4486827 (1984-12-01), Shima et al.
patent: 5097913 (1992-03-01), Mensch, Jr.
Lee Thomas C.
Samsung Semiconductor Inc.
LandOfFree
Method for programming a pin compatible memory device by maintai does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for programming a pin compatible memory device by maintai, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for programming a pin compatible memory device by maintai will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1149850