Serial control apparatus with a single chip select signal

Details Serial control apparatus with a single chip select signal Serial control apparatus with a single chip select signal

1993-02-24

1996-10-22

Lee, Thomas C.

Boots, shoes, and leggings

39520016, 395824, 395828, 395829, 3642383, 3642472, 36492693, G06F 1300, G06F 1320

Patent

active

055686478

ABSTRACT:
A serial control apparatus is arranged so that an increased number of ICs mounted on a printed circuit card does not increase the number of signal lines for selecting the ICs. The serial control apparatus has a plurality of printed circuit cards each carrying a plurality of ICs and a CPU for controlling the plurality of ICs. Each card has a card match detecting means for identifying the card itself and generating a chip select signal to be sent commonly to all ICs on that card. Each of the ICs contains IC a match detector means for identifying the IC itself. The CPU generates serial identification signals including a card specification signal and an IC specification signal. Based on these signals and each of the match detectors, a particular IC on a particular card is selected.

REFERENCES:
patent: 3715725 (1973-02-01), Kievit et al.
patent: 4268904 (1981-05-01), Suzuki et al.
patent: 4628478 (1986-12-01), Henderson, Jr.
patent: 4769768 (1988-09-01), Bomba et al.
patent: 4809229 (1989-02-01), Nukiyama
patent: 4912309 (1990-03-01), Danielson et al.
patent: 4930070 (1990-05-01), Yonekura et al.

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