XNet Creation and SI Simulation in Allegro System Capture
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XNet Creation in DML-Independent Mode
XNet creation is done in two ways in the DML-independent mode. This is pre-configured
in the SITE area so that all the projects follow the same mode of operation. When a new
design is created, the mode is read from the SITE area, and established for the design.
The modes of operation are:
1. Automatic XNet creation across discrete devices when devices get added to the
design
In the Automatic XNet creation mode:
➢ XNets are created automatically between pins of a discrete device.
➢ XNets can also be created between pins of non-discrete devices by adding
XNET_PINS pin-level property.
o Nets connected to the pins of a component with the same value of the
property creates an XNet.
➢ XNets are not created automatically when:
o The component is not a discrete device
o Any of the pins are connected to a DC Net
o Pin limit is exceeded; the default maximum is 25 pins
o NO_XNET_CONNECTION property is found on the instance
2. Manual XNet creation across discrete devices
In the manual XNet creation mode:
➢ XNets are not automatically created between the pins of a discrete device.
➢ XNets can be created between pins of devices by adding the XNET_PINS
pin-level property
o Nets connected to the pins of a component with the same value of the
property creates an XNet.
➢ In this mode, even if the XNET_PINS property is defined, XNets are not
created when:
o Any of the pins are connected to a DC Net
o Pin limit is exceeded; the default maximum is 25 pins
