High security counter

Details High security counter High security counter

H - Electricity

03

K

H03K 23/00 (2006.01) G01C 22/00 (2006.01) G01C 22/02 (2006.01) G06M 3/12 (2006.01)

Patent

CA 2117693

Image (see fig. 1) A high security counting system is shown for counting events represented by an event signal. The counting system includes a nonerasable programmable read only memory (15) which is programmed by a programmer (14) under the control of a controller (10, 12). The controller is responsive to an event signal for controlling the programmer to program a bit from a first value to a second value wherein each bit programmed to a second value represents a unit of count and the number of bits programmed to the second value represents the count of said counter.

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