Integrated electronic watch circuits with a plurality of...

G - Physics – 04 – C

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58/0.3

G04C 3/00 (2006.01) G04G 99/00 (2010.01) G04F 10/04 (2006.01) G04G 5/04 (2006.01) G04G 9/08 (2006.01)

Patent

CA 1074132

ABSTRACT OF THE DISCLOSURE 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 program- mable 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.

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