Product Documentation
Spectre AMS Designer and Xcelium Simulator Mixed-Signal User Guide
Product Version 22.09, September 2022

Mixed-Signal Activity Statistics

After exiting a simulation, AMS Designer displays the mixed-signal activity statistics along with the additional activity statistics of the Interface Elements (IEs) for the simulation run.

Example:

**** AMSD: Mixed-Signal Activity Statistics ****

Number of A-to-D events:                  857 

Number of A-to-D events in IEs:           857  

Number of D-to-A events:                  138 

Number of D-to-A events in IEs:           138  

Number of VHDL-AMS Breaks:                0  

Number of direct digital accesses:        56

**** AMSD: IE Additional Activity Statistics ****
Number of IEs with D-to-A X event:        3 
Number of IEs with D-to-A Z event:        0 
Number of IEs with A-to-D X event:        0 
Number of IEs with A-to-D Z event:        0 
Number of IEs with Vin exceeded limit:    4
Number of IEs with Vdd exceeded limit:    0 
IE with max number of D-to-A conversions: 120 
PLL_160MHZ_sim.CLK_160MHZ__L2E_2__logic 
IE with max number of A-to-D conversions: 354 
PLL_160MHZ_sim.I3.VCO_CLK__E2L_2__logic
Number of reporting IEs / total IEs:      8/8
Number of IEs with Vin/Vdd limit checked: 8

The following table describes the statistics displayed in the example given above.

Activity Statistic

Description

Activity Statistic

Description

Number of A-to-D events The number of analog-to-digital events.
Number of A-to-D events in IEs The number of analog-to-digital events in the IEs.
Number of D-to-A events The number of digital-to-analog events.
Number of D-to-A events in IEs The number of digital-to-analog events in the IEs.
Number of VHDL-AMS Breaks The number of VHDL-AMS breaks.
Number of direct digital accesses The number of direct digital accesses.
Number of IEs with D-to-A X event The number of IEs that detected digital-to-analog events with x states.
Number of IEs with D-to-A Z event The number of IEs that detected digital-to-analog events with z states.
Number of IEs with A-to-D X event The number of IEs that detected analog-to-digital events with x states.
Number of IEs with A-to-D Z event The number of IEs that detected analog-to-digital events with z states.
Number of IEs with Vin exceeded limit The number of IEs for which the value of Vin exceeded the specified limit.
Number of IEs with Vdd exceeded limit The number of IEs for which the value of VDD exceeded the specified limit. 
IE with max number of D-to-A conversions The maximum number of digital-to-analog conversions for the IE mentioned below this statistic.
PLL_160MHZ_sim.CLK_160MHZ__L2E_2__logic The name of the IE that has the maximum number of digital-to-analog conversions.
IE with max number of A-to-D conversions The maximum number of analog-to-digital conversions for the IE mentioned below this statistic.
PLL_160MHZ_sim.I3.VCO_CLK__E2L_2__logic The name of the IE that has the maximum number of analog-to-digital conversions.
Number of reporting IEs / total IEs The number of reported IEs along with the total number of IEs in the design.
Number of IEs with Vin/Vdd limit checked The number of IEs for which the  Vin or VDD limit is checked.
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