Advanced SEU Detection and Fault Injection IPs

Description

Due to a problem with the Intel® Quartus® Prime Software, you may see Timing Analyzer warnings regarding clocks with no constraints.

Timing constraints are required to properly operate the SEU IPs (the Advanced SEU Detection and Fault Injection IPs). The user must provide these constraints in a Synopsys* Design Constraint (.sdc) file.

Resolution

To work around this problem, add these constraints either by adding them directly into an existing SDC constraints file, or putting them into a separate file (for example, “seu_constraints.sdc”)

# constraints for SEU IP

create_clock -name intosc -period 10.000 [get_nets {*|alt_fault_injection_component|alt_fi_inst|intosc}]

create_generated_clock -name emr_unloader_STATE_CLOCKHIGH -source [get_nets {*|alt_fi_inst|intosc}] [get_keepers {*altera_emr_unloader:emr_unloader_component|current_state.STATE_CLOCKHIGH}]

create_generated_clock -name asd_current_state_MISS       -source [get_nets {*|alt_fi_inst|intosc}] [get_keepers {*|asd_cache:asd_cache_inst|current_state.STATE_MISS}]

create_generated_clock -name asd_cpuread_oneshot          -source [get_nets {*|alt_fi_inst|intosc}] [get_keepers {*|asd_cache:asd_cache_inst|asd_ext_oneshot:cpuread_oneshot|last}]

set_clock_groups -exclusive -group [get_clocks {emr_unloader_STATE_CLOCKHIGH}]

set_clock_groups -exclusive -group [get_clocks {asd_current_state_MISS}]

set_clock_groups -exclusive -group [get_clocks {asd_cpuread_oneshot}]