Checking Conflicting Power Domains on Mixed-Signal Boundary

Multiple power domains connecting to the same connect module on the digital or analog side result in a voltage conflict. The Xcelium simulator with mixed-signal option checks for such voltage conflicts during the elaboration stage and generates an error if:

• A power-smart IE connects to the digital drivers with different power domains.
  
  xmelab: *E,PIEMLDR: [LPS] Multiple digital drivers from different power domains are connected to same mixed-signal net

• A power-smart IE connects to the digital loads with different power domains.
  
  xmelab: *E,PIEMLLD: [LPS] Multiple digital loads from different power domains are connected to same mixed-signal net

• A power-smart IE connects to the analog signals (drivers or loads) with different power domains.
  
  xmelab: *E,PIEMASG: [LPS] Multiple analog signals from different power domains are connected to same mixed-signal net

• A power-smart IE connects to wreal or real signals (drivers and loads) with different power domains.
  
  xmelab: *E,PIEMRSG: [LPS] Multiple real valued signals from different power domains are connected to same mixed-signal net

  To downgrade these errors to a warning, you can use the -xmwarn option with the error message ID (-xmwarn PIEMLLD) and re-run the design.

This feature works only when the power domain voltage is specified in the CPF file and enabled for low power simulation. You must specify the following:

• -lps_pmode or -lps_mvs or -lps_ams_connect_supply

• -lps_ams_sim or the boundary port domain specified on the analog or wreal port

In addition, you must specify the following in the CPF file:

• If -lps_pmode or -lps_mvs is enabled, you must specify:
  • create_nominal_condition
• • create_power_domain, -active_state_condition, or create_power_mode

• If -lps_ams_connect_supply is enabled, you must specify update_power_domain, -primary_power_net, or -primary_ground_net