''ERROR:Bitgen:342 - This design contains pins which are not constrained (LOC) to a specific location or have an undefined I/O Standard (IOSTANDARD).This maycause I/O contention or incompatibility with the board power or connectivity affecting performance, signal integrity or in extreme cases cause damage to the device or the components to which it is connected.To prevent this error, it is highly suggested to specify all pin locations and I/O standards to avoid potential contention or conflicts and allow proper bitstream creation. To demote this error to a warning and allow bitstream creation with unspecified I/O location or standards, you can apply the following bitgen switch: -g UnconstrainedPins:Allow."
ソリューション
ISE Design Suite 13.2 以降は、ロケーション制約が適用されていないか、IOSTANDARD が割り当てられていないピンがある場合に、このエラー メッセージが表示されます。