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ATsao3's avatar
ATsao3
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1 month ago

State machine question in Arria X device

Hello all, In my design, there has a state machine having 28 states. The function is all good in RTL simulation. After full compilation and program to the device. There will be some state doesn't ...
Compilation
FvM's avatar
FvM
Icon for Super Contributor rankSuper Contributor
1 month ago

Hi,
syn_encoding attribute works well for me, however I didn't check in this specfic Quartus version.
Sure your code follows Quartus state machine encoding template?

The only dedicated syn_encoding that I'm using in some cases is "safe". "Sequential" saves registers but uses more logic cells for internal decoding, an example with 31 states needs 39 extra logic elements for sequential compared to default one-hot encoding.

Regards
Frank