Multiple time zone, alarm and user programmable custom watch

Details Multiple time zone, alarm and user programmable custom watch Multiple time zone, alarm and user programmable custom watch

1978-05-09

1981-08-11

Miska, Vit W.

Horology: time measuring systems or devices

Chronological

With pulse transforming means

368155, 368217, 307473, G04C 1900, G04C 300, H03K 1908

Patent

active

042837847

ABSTRACT:
An integrated circuit watch which employs a RAM and PLA to execute its timekeeping functions can be significantly improved to include a multiplicity of zones without entailing greater complexity of circuitry or large amounts of chip space and may incorporate user programmability by incorporation of the present invention. The number of independent and distinct watch functions within the integrated circuit watch can be increased by coupling a flag RAM to the main PLA. The flag bits, which are associated with the counting states of each separate watch function are then accessibily stored within the flag RAM and appropriately coupled to the main PLA to execute the required timekeeping operation at the appropriate time. A processor is coupled to the flag RAM and may selectively process or manipulate each of the flag bits in the flag RAM in response to instructions or control signals, some of which may be user initiated. User programmability may be incorporated by generating time delay request signals in a control circuit when any one of the watch zones is in a given state. After a specific timed delay as determined by a particular time delay request signal, a time delay reset signal is generated by the control circuitry. If upon the occurrence of the time delay reset signal, one or more other events also occur, such as the closure of a selected switch, the control circuitry can be configured in a predetermined state independently selected from the sequential plurality of states which the control circuitry would normally assume.

REFERENCES:
patent: 3828278 (1974-08-01), Rees
patent: 3829713 (1974-08-01), Canning
patent: 3912947 (1975-10-01), Buchanan
patent: 4063409 (1977-12-01), Bayliss
patent: 4068461 (1978-01-01), Fassett et al.
patent: 4125993 (1978-11-01), Emile

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