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Description
This applet is meant to demonstrate the basic NOT (inverter), AND, and OR logic functions in the std_logic_1164 multilevel logic system. To this end, it includes a special interactive switch (hades.models.io.IpinStdLogic1164) that can directly generate all logic values of the std_logic system. Just click on the corresponding field in the switch's symbol to generate that output value. A click in the (0/1) field will toggle the output value between '0' and '1'.
std_logic_1164 NOT:
U X 0 1 Z W L H D ----------------- U X 1 0 X X 1 0 X
std_logic_1164 AND:
U X 0 1 Z W L H D ----------------- U | U U 0 U U U 0 U U X | U X 0 X X X 0 X X 0 | 0 0 0 0 0 0 0 0 0 1 | U X 0 1 X X 0 1 X Z | U X 0 X X X 0 X X W | U X 0 X X X 0 X X L | 0 0 0 0 0 0 0 0 0 H | U X 0 1 X X 0 1 X D | U X 0 X X X 0 X X
std_logic_1164 OR:
U X 0 1 Z W L H D ----------------- U | U U U 1 U U U 1 U X | U X X 1 X X X 1 X 0 | U X 0 1 X X 0 1 X 1 | 1 1 1 1 1 1 1 1 1 Z | U X X 1 X X X 1 X W | U X X 1 X X X 1 X L | U X 0 1 X X 0 1 X H | 1 1 1 1 1 1 1 1 1 D | U X X 1 X X X 1 X
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