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Manufacturer Part #
AX2000-CQ352M
IC FPGA 198 I/O 352CQFP
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| Mfr. Name: | Microchip | ||||||||||
| Standard Pkg: | Product Variant Information section Available PackagingPackage Qty:1 per Box | ||||||||||
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Addendum to PCN1309 and PCN1309A - Synopsys Synplify Pro Software Bug Regarding Safe State Machine RecoveryDescriptionMicrosemi and Synopsys have recently become aware of a scenario that can result in a state machine design not being implemented with logic circuits which force the state machine into a reset state if an illegal state is detected.Description of the ProblemWhen a design is synthesized with the one-hot state machine encoding style and includes state machines with only two states, Synplify Pro may not recognize them as state machines. If the state machine is marked for "safe" implementation, and this bug affects the design, then the inferred extra logic that forces a reset during an illegal state condition will not be added. This problem can occur only when all of the following conditions are true.The design is synthesized with the "safe" encoding style for the state machine (the user has specified syn_encoding=�safe�).The state machine is instructed to use "onehot" encoding through the Implementation Options > VHDL setting.The state machine has only two states.The state machine does not have a syn_state_machine="true" attribute.
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