1976-01-05
1977-12-20
Schaefer, Robert K.
58 395, 58 50R, 58 4A, G04C 300
Patent
active
040634094
ABSTRACT:
A random access memory is combined with a programmable logic array to count time pulses within an integrated circuit watch. A master oscillator drives the internal timing clocks and serves as a time standard for a timing and control circuit means which manipulates data within the random access memory. The timing and control circuit may contain a programmable read-only memory so that words stored within the random access memory may be read, and manipulated, in a selected sequence. The programmable logic array increments the word selectively read from the random access memory, compares it to a limit value and generates one or more flags according to the desired data manipulation. Words stored within the random access memory may be selectively displayed by a liquid crystal display or light emitting diode display in a selected format determined by the programmable read-only memory. A driver circuit coupled to the display may also contain a read-only memory so that the data may be displayed in a selected one of plurality of display fonts. The operational and display modes may be customized by appropriately modifying the programmable logic array and read-only memories without altering the system architecture.
REFERENCES:
patent: 3803587 (1974-04-01), Mead
patent: 3876867 (1975-04-01), Schull et al.
patent: 3879723 (1975-04-01), Hornung
patent: 3912914 (1975-10-01), Moylan
patent: 3925777 (1975-12-01), Clark
patent: 3937004 (1976-02-01), Natori et al.
patent: 3946549 (1976-03-01), Cake
patent: 3955355 (1976-05-01), Luce
patent: 3961472 (1976-06-01), Riehl
patent: 3962571 (1976-06-01), Brantingham
patent: 3962858 (1976-06-01), Levine et al.
patent: 3962861 (1976-06-01), Protta et al.
patent: 3973110 (1976-08-01), Rode et al.
Intel Corporation
Miska Vit W.
Schaefer Robert K.
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