(Reporter) The always block omits the power circuit (SOC) represented by Else)

Source: Internet
Author: User

Abstract
In OpenGL, always block can be used to represent flip-flop, combination logic and latch. In this article, always block represents the power path without modifying else.

Introduction
In the C example, else is omitted, but it does not mean it is handled. However, else does not represent a different electrical path in the Tilde.

Always@ (OrBOrEn)
If(EN)
C = A & B;

Else is omitted in combination logic ~ En retains the original value, so latch is generated.

Always@ (Posedge CLK)
If(EN)
C <= A & B;

It must also be in ~ En retains the original value, but since flip-flop has a memory function, latch cannot be produced. If MUX is generated, and the value of flip-flop is pulled back to MUX.

Conclusion
In OpenGL, although it is only a small difference, the result is a huge difference.

The full text is complete.

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