Quartus® Prime Pro Edition Settings File Reference Manual

ID 683296
Date 7/08/2024
Public
Document Table of Contents

ENABLE_BUS_HOLD_CIRCUITRY

Enables bus-hold circuitry during device operation. If this option is turned on, a pin will retain its last logic level when it is not driven, and will not go to a high impedance logic level. The 'Enable Bus-Hold Circuitry' option should not be used at the same time as the 'Weak Pull-Up Resistor' option. This option is ignored if it is applied to anything other than a pin.

Type

Boolean

Device Support

  • Intel Agilex® 5
  • Intel Agilex® 7
  • Arria® 10
  • Cyclone® 10 GX
  • Stratix® 10

Notes

This assignment supports Fitter wildcards.

This assignment is included in the Fitter report.

Syntax

set_global_assignment -name ENABLE_BUS_HOLD_CIRCUITRY <value>
set_global_assignment -name ENABLE_BUS_HOLD_CIRCUITRY -entity <entity name> <value>
set_instance_assignment -name ENABLE_BUS_HOLD_CIRCUITRY -to <to> -entity <entity name> <value>

Default Value

Off

Example

set_instance_assignment -name ENABLE_BUS_HOLD_CIRCUITRY ON -to pin