Mentor v8.6_4 manual Add Capture Handling

Add Capture Handling Command Dictionary

Add Capture Handling

Tools Supported: FastScan

Scope: All modes

Prerequisites: You can use this command only after FastScan flattens the design to the simulation model, which happens when you first attempt to exit Setup mode or when you issue the Flatten Model command.

Usage

ADD CApture Handling {Old New X} {gate_id# pin_pathname instance_name {-Cellcell_name}}... [-SInk -SOurce]

Description

Specifies the data capturing behavior for the given state element.

After changing the data capture handling for selected state elements with Add Capture Handling, you need to issue the Set Capture Handling command to allow FastScan to automatically identify the upstream state elements with their associated sinks, and the downstream state elements with the associated sources you defined.

When you use the Add Capture Handling command to change the data capture handling settings, you cannot define source points with the new handling behavior if they propagate to sink points that do not have the new behavior, or to non-clock primary outputs. If FastScan has different capture handling behaviors for the same state element, the behavior you define with the Add Capture Handling command overrides the behavior you globally defined with the Set Capture Handling command.

FastScan limits the scope of the effect of the capture handling behavior to the circuitry between the source and the sink points. You cannot simulate a newly captured effect past the sink point.

You can change the simulation behavior of RAM models with data hold capability using the Add Capture Handling command. This is useful in cases when it is required to model a RAM which has data hold capability but does not introduce any latency.

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