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Example OR gate

Behavior

The OR gate outputs the result of the OR function of the 1-bit signals at the input. The output only has the value 1 if at least one of the inputs has the value 1.

Unconnected inputs always have the value 0.

Table 1. truth table
0 1 Z X

0

0

1

0

X

1

1

1

1

1

Z

0

1

0

X

X

X

1

X

(Z: Undefined/High impedance, X: Error)

Mnemonics

The logical gates of Antares can illustrate their function with so-called "mnemonics". See the chapter Descriptions and explanations. The mnemonic of the OR gate is shown below.

Example Mnemonic

Ports

Inputs

The 1-bit inputs of the OR gate. Their number is determined by the attribute "Number of inputs".

Output

The 1-bit output of the OR gate. Outputs the value of the calculated OR function.

Attributes

Orientation

The direction in which the output points.

Number of inputs

Determines how many inputs the OR gate has. There are 2 to max. 8 inputs available. If the OR gate is already connected to wires, this attribute cannot be changed.

Output Name

The optional name displayed next to the output. This can be useful when the OR gate forms the end of a complex combinatorial circuit and the logical expression produced by the OR gate should be specified.