CPC G11C 7/24 (2013.01) [G11C 7/222 (2013.01); G11C 29/52 (2013.01)] | 20 Claims |
1. An apparatus, comprising:
two tables stored in memory, each table configured to store an identical number of counters;
circuitry configured to:
receive consecutive periodic signals of a first type at a regular fixed interval during a monitoring duration;
reset one, but not the other, of the two tables in response to each of a first signal of the consecutive periodic signals and every alternate signal of the consecutive periodic signals occurring after the first signal, and reset the other, but not the one, of the two tables in response to a second signal of the consecutive periodic signals and every alternate signal of the consecutive periodic signals occurring after the second signal, wherein the first signal and the second signal are consecutive signals;
increment a corresponding counter in each of the two tables in response to each second type of signal received during the monitoring duration;
generate a third type of signal when any one of the counters exceeds a predetermined threshold during the monitoring duration.
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