Static information storage and retrieval – Magnetic bubbles – Guide structure
Patent
1993-01-25
1995-09-26
Chan, Eddie P.
Static information storage and retrieval
Magnetic bubbles
Guide structure
395493, 36518912, 365236, 3652385, 365219, 364DIG1, 3642451, 3642474, 364DIG2, 3649333, G06F 1204, G06F 1200, G11C 1928, G11C 700
Patent
active
054540976
ABSTRACT:
A cascadable peripheral (10) has at least two registers (51, 52, 53) of different sizes. Input data is shifted serially through a shift register (40) synchronously with a clock signal. A serial output of the shift register (40) is provided to a data output terminal (18) of the peripheral (10) for cascading. A counter (20) increments a state in response to the clock signal. A decode portion (30, 31, 32, 33, 35) activates one of a group of load signals, corresponding to one of the registers (51, 52, 53), in response to a state of the counter (20), when an enable signal becomes inactive. The active load signal causes the corresponding register to load a value presented from a parallel data output of the shift register (40). The counter (20) is reset in response to either the enable signal becoming inactive or the counter (20) reaching a maximum count corresponding to a size of the shift register (40).
REFERENCES:
patent: 4084154 (1978-04-01), Panigrahi
patent: 5146577 (1992-09-01), Babin
patent: 5262907 (1993-11-01), Duffy et al.
Bragdon Reginald G.
Chan Eddie P.
Motorola Inc.
Polansky Paul J.
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