Power Nets

This section of the board file defines which nets on the board are connected to power or ground. This information is important for two reasons:

• The connection test will know not to drive these nets.
• The connection test can automatically check pull resistors using this list of nets and "PULL" statements in PDD files.

Termination reference voltage nets (representing constant voltages to which signals are terminated) are a special type of power net, which have an undefined value and therefore cannot have pull resistors attached to them or be assumed to be high or low in logic value. This type of net is used in conjunction with BIAS_TERM connections.

Syntax

POWER LIST
    POWER := netName {, netName, ... } ;
    GROUND := netName {, netName, ... } ;
    TERMREF := netName {, netName, ... } ;
END;

The netName refers to the name of the net as specified in the netlist file for the board.

Example

POWER LIST
    POWER  := VCC, VDD, VDDx;
    GROUND := GND, AGND, DGND;
    TERMREF := VTT;
END;