AR# 2288: M1.5/M1.4/M1.3 MAP: BEL-level PROHIBIT constraints are not supported
AR# 2288
M1.5/M1.4/M1.3 MAP: BEL-level PROHIBIT constraints are not supported
説明
Keywords: prohibit bel constraint comp
Urgency: standard
General Description: Reference Number: 17678 In the M1.3 release, MAP is COMP-based, meaning it supports constraints at the CLB, IOB, wide decoder, and TBUF level.
Constraints (including PROHIBIT constraints) placed on BELs (Basic Elements like flip-flops or function generators within a CLB or IOB) are not supported.
For this release, Map will only accept PROHIBIT constraints on COMPs. There is no way to prohibit specific Registers, FMAPs, or HMAPs in the CLB from being used.
ソリューション
To prevent Map from placing additional logic into specific BELs of a CLB, configure the CLB in EPIC, create a hard macro from the CLB, and instantiate it into your design.
For more information on creating physical macros, refer to the (Xilinx Manual EPIC Design Editor Reference/User Guide)