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Altera_Forum
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15 years ago

ModelSim undefined initial value

Hello, I am trying to do some simple simulation using modelsim-altera and am seeing undefined value for output "result" and it stays like that until 10ns or so into the simulation. Here is the examp...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

1) Initial block are sythesized by Quartus. Of course not every construct in an initial block can be sythesized, but assigning power-up values to registers is valid. Many people however, don't like to use power-up values, they use reset instead.

2) An external reset is not mandatory, most designs can use an internal one.

3) Just forget about gate level simulation. Use static timing analysis and RTL level simulation.