Implementation Constraints
Physical implementation may be controlled in the UCF file, such as:
- FAST : Set Faster IO Slew rate
- e.g. INST $1I87/OBUF FAST
- PART : Define Part-type to be used
- e.g. CONFIG PART=4005E-PQ160C-5;
- BUFG : Force signal to onto global net (CPLD only)
- e.g. INST clkgen/fastclk BUFG;
- INIT : Define initial RAM/ROM Contents (primitives only)
- e.g. INST $1I3245/ROM2 INIT = 5555;
Such Physical constraints may be Architecture dependent