What is Synchronous and Asynchronous Reset in FPGA Design?

In FPGA design, synchronous and asynchronous reset are two methods used to reset the state of a flip-flop or register. The focus keyword for this article is "synchronous and asynchronous reset".

Synchronous Reset:

Synchronous reset is a reset signal that is synchronized to the clock signal used in the design. This means that the reset signal is applied only when the clock signal transitions. It ensures that the reset operation is performed at specific clock cycles, preventing any timing issues.

Asynchronous Reset:

Asynchronous reset, on the other hand, is a reset signal that is independent of the clock signal. It can be asserted at any time, regardless of the clock state. While asynchronous reset offers simplicity in implementation, it can lead to potential timing hazards if not synchronized properly.

Both synchronous and asynchronous reset methods have their advantages and disadvantages, and the choice between them depends on the specific requirements of the FPGA design.