# What does "Enable" mean in this picture? The EN

1. Jan 28, 2015

### LongApple

I been searching

2. Jan 29, 2015

### Svein

This is a combinatorial circuit. The logic equation is $\neg (((A \wedge B) \vee C) \vee EN)$. Thus, unless EN is asserted, nothing happens. That is why it is called "Enable".