I need some comments on managing the 'global reset' in ISE6.3(XST) from experienced one.
I am post-placement-and-routing simulating in Modelsim. This module has input reset port. During synthesis/mapping, there is no warning/error.
During the simulation, followings are observed, which are maybe or maybe not be problematic.
- In behavioral simulation, it works, even though no value is assigned to reset signal in test vector.
- After placement-and-routing simulation, it works, only when we put reset signal is '0' in test vector.
I am wondering if this is problematic.