set_vref_defaults

Sets the default VREF pins for the specified bank. This command is ignored if the bank does not need a VREF pin. The ProASIC3 family does not support VREF pins.

set_vref_defaults bankname

Arguments

bankname

Specifies the name of the bank in which the default VREF pin is located. For ProASIC3E and Axcelerator devices, banks are numbered from 0-7. Therefore, their bank names are bank0, bank1, bank2, etc.

Supported Families

Fusion, ProASIC3E and Axcelerator

Description

Some I/O technologies need VREF settings. Some technologies may also need a minimum number of VREF pins for every certain number of input pins. These details are device dependent. Refer to the databook for your device for details. Designer can assign default VREF pins. However, the number of VREF pins Designer assigns may be too conservative, and you may not need as many VREF pins as the default assignment.

Exceptions

None

Examples

This example sets the default VREF pins for Bank 1: