Altera Quartus II Settings File - Manual (Page 526)

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
This setting can be used in projects targeting any Altera device family.
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
526 ENABLE_BUS_HOLD_CIRCUITRY
MNL-Q21005
2015.05.04
Altera Corporation Quartus Settings File Reference Manual
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