Quartus II Settings File Reference Manual - Altera

6–286 Chapter 6: Fitter Assignments
RESERVE_DATA0_AFTER_CONFIGURATION
RESERVE_DATA0_AFTER_CONFIGURATION
Type
Specifies how the Data[0] pin should be used when the device is operating in user
mode after configuration is complete. Depending on the current device and
configuration scheme, the Data[0] pin can be reserved as a regular I/O pin, as an
input that is tri-stated, as an output that drives ground, as an output that drives an
unspecified signal, or compiler configured. If the Data[0] pin is reserved as a regular
I/O pin, the Data[0] pin can be used as an ordinary I/O pin after configuration. If the
Data[0] pin is only used to interface with external memory for configuration, the
Data[0] pin 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:
■ Arria GX
■ Arria II GZ
■ Cyclone III
■ Cyclone III LS
■ Cyclone IV E
■ Cyclone IV GX
■ HardCopy II
■ HardCopy III
■ HardCopy IV
■ Stratix
■ Stratix GX
■ Stratix II
■ Stratix II GX
■ Stratix III
■ Stratix IV
■ Stratix V
Quartus Settings File June 2012 Altera Corporation
Reference Manual