Synchronizer Toggle Rate logic option

Specifies the toggle rate of this register. The units for this value are in transitions per second. This is used when calculating the Mean Time Between Failures (MTBF) of a synchronizer chain in the Metastability Report. This only applies when the Timing Analyzer is used. You can specify the desired frequency setting on the first register of a synchronizer chain, and this will determine the data rate used in the MTBF estimation. There are two other assignments associated with toggle rates. The I/O Maximum Toggle Rate is only used for pins, and specifies the worst-case toggle rates used for signal integrity purposes. The Power Toggle Rate assignment is used to specify the expected time-averaged toggle rate, and is used by the Power Analyzer to estimate time-averaged power consumption.

Type—double
Device support—all supported devices
Notes—supports wildcard characters

Syntax:

set_instance_assignment -name SYNCHRONIZER_TOGGLE_RATE -to <to> \
-entity <entity name> <value>

Note: For more information about metastability, refer to the Quartus^® Prime Pro Edition User Guide: Design Recommendations