Quartus II Settings File Reference Manual - Altera

Chapter 6: Fitter Assignments 6–293
RESERVE_DATA7_THROUGH_DATA2_AFTER_CONFIGURATION
RESERVE_DATA7_THROUGH_DATA2_AFTER_CONFIGURATION
Type
Specifies how the Data[7..2] pins should be used when the device is operating in user
mode after configuration is complete. Depending on the current device and
configuration scheme, these pins can be reserved as regular I/O pins, as inputs that
are tri-stated, as outputs that drive ground, as outputs that drive an unspecified
signal, or compiler configured. If the Data[7..2] pins are reserved as a regular I/O
pins, the Data[7..2] pins can be used as ordinary I/O pins after configuration. If
Data[7..2] pins are only used to interface with external memory for configuration, the
Data[7..2] pins should be reserved as compiler configured.
Enumeration
Device Support
■ As input tri-stated
■ As output driving an unspecified signal
■ As output driving ground
■ Compiler configured
■ Use as regular IO
This setting can be used in projects targeting the following device families:
■ Cyclone III
■ Cyclone III LS
■ Cyclone IV E
■ Cyclone IV GX
Syntax
set_global_assignment -name
RESERVE_DATA7_THROUGH_DATA2_AFTER_CONFIGURATION
Example
set_global_assignment -name
RESERVE_DATA7_THROUGH_DATA2_AFTER_CONFIGURATION "USE AS REGULAR IO"
Default Value
Use as regular IO
June 2012 Altera Corporation Quartus Settings File
Reference Manual