Rievtech xLogic ELC Series - NAND with Edge Evaluation

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5.3.4 NAND with edge evaluation
Fashion: Classic:
The output of a NAND with edge evaluation is only 1 at least one input is 0 and all inputs were 1 during
the last cycle.
The output is set to 1 for the duration of one cycle and must be reset to 0 at least for the duration of the
next cycle before it can be set to 1 again.
A block input that is not used (x) is assigned: x = 1.
Timing diagram of a NAND with edge evaluation