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DS33Z41 Quad IMUX Ethernet Mapper
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8.15.5.2 Performance Monitoring Update
All counters stop counting at their maximum count. A counter register is updated by asserting (low to high
transition) the performance monitoring update signal (PMU). During the counter register update process, the
performance monitoring status signal (PMS) is deasserted. The counter register update process consists of
loading the counter register with the current count, resetting the counter, forcing the zero count status indication
low for one clock cycle, and then asserting PMS. No events shall be missed during an update procedure.