NOR

image\block_nor_sn.gif

The output of a NOR (NOT OR) is only 1 if all inputs are 0 (open). When one of the inputs is switched on (logical 1 state), the output is switched off.

A block input that is not used (x) is assigned: x = 0.

NOR function logic table

 

Input 1

Input 2

Input 3

Input 4

Output

0

0

0

0

1

0

0

0

1

0

0

0

1

0

0

0

0

1

1

0

0

1

0

0

0

0

1

0

1

0

0

1

1

0

0

0

1

1

1

0

1

0

0

0

0

1

0

0

1

0

1

0

1

0

0

1

0

1

1

0

1

1

0

0

0

1

1

0

1

0

1

1

1

0

0

1

1

1

1

0

 

Overview